hp pavillion dv2700 graphic driver coprocessor sm bus controller, and cam driver
Vielfred U. Nodado
Comptech Student
AMG-SHTCI
Cagayan Valley Rd. Makapilapil
San Ildefonso, Bulacan
--- On Sat, 11/14/09, Ardell Faul <ardell@...> wrote:
From: Ardell Faul <ardell@...> Subject: Re: [Laptop_Repair] Toshiba Qosmio G15R - Accessing the fan(s) To: Laptop_Repair@yahoogroups.com Date: Saturday, 14 November, 2009, 2:49 AM
The only way to access the fans is to completely disassemble the unit. The fans have sealed bearings, and
if they are making noise, you will have to replace the whole fan.
Ardell Faul Computer Monitor Service Inc. Ardell's Laptop and PC Repair 10816 E. Mission Ave., Spokane Valley, Wa. 99206 ardell@... 509-891-5188
Vincent L wrote: > > The fan(s) on mine sound like they need lubrication, but I don't know > the appropriate way to access them. I lifted the speaker panel and > keyboard and found more plastic shielding. > > I also found an older thread here on the G15 and I'll be reading in > more detail. I know about irisvista, but I'd love to get documentation > specifically relating to the G15 and not the F15. > > Thanks for reading. > >
It would probably be a better use of time and energy to replace the faulty fan.
--- On Fri, 11/13/09, Vincent L <vincentsyahoogroups@...> wrote:
From: Vincent L <vincentsyahoogroups@...> Subject: [Laptop_Repair] Toshiba Qosmio G15R - Accessing the fan(s) To: Laptop_Repair@yahoogroups.com Date: Friday, November 13, 2009, 1:36 PM
The fan(s) on mine sound like they need lubrication, but I don't know the appropriate way to access them. I lifted the speaker panel and keyboard and found more plastic shielding.
I also found an older thread here on the G15 and I'll be reading in more detail. I know about irisvista, but I'd love to get documentation specifically relating to the G15 and not the F15.
Thanks Ardell Faul.
That's about what I am finding. I am going this week to a computer recycler and
compare a bunch for dimensions and internal structure.
The face plate is indeed a bit odd compared to the others we have.
Thanks for your time.
--- In Laptop_Repair@yahoogroups.com, Ardell Faul <ardell@...> wrote:
>
> Laptop Optical drives are all pretty much standardized as far as the
> mounting and hole alignment goes. So a lot of different drives will fit
> into any given laptop. The problem is that the plastic faceplate is
> designed specifically for the laptop it goes in so the cowling matches
> the body of the laptop smoothly.
SNIP
Hi I recently installed a replacement mobo, hdd and keyboard to an HP NC4010
notebook. I now need to go into bios to set the machine to boot from CD so that
I can install windows. However when I enter bios by pressing f10 I find that I
can't navigate around the menus, I can only use up or down keys, left and right
don't work. One option open to me in the initial menu is to reset to default
settings, I tried this to no avail. I have also tried disconnecting the power
and battery and pressing the start button gor 30 seconds. Could it be that the
bios is password protected, or locked in some way and if so how do I reset it
bearing in mind my restricted keyboard. (I have also tried 2 different keyboards
and they both do the same)
Any help would be greatly appreciated people!
Kevin
Thanks Ardell Faul. That's about what I am finding. I am going this week to a computer recycler and compare a bunch for dimensions and internal structure. The face plate is indeed a bit odd compared to the others we have.
Thanks for your time.
--- In Laptop_Repair@ yahoogroups. com, Ardell Faul <ardell@...> wrote: > > Laptop Optical drives are all pretty much standardized as far as the > mounting and hole alignment goes. So a lot of different drives will fit > into any given laptop. The problem is that the plastic faceplate is > designed specifically for the laptop it goes in so the cowling matches > the body of the laptop smoothly.
Hi Group,
I'm on a lot of groups, and have yet to be able to find ANY useful information
when I have tried to use the MESSAGE SEARCH FUNCTION, or the ADVANCED SEARCH.
On some groups, there is a survey link, above the message box, to sign up for
the new and improved revised search. Do that! Only it's dated back in May. And
WHY wouldn't all groups qualify to run the same search engine??
I did some looking, and found a "Yahoo Groups suggestion box" if you will.. with
long term history of complaints, but very few "votes" to do anything about the
problems. So.. I'm asking that ALL OF YOU visit this link below.. AND VOTE!!
It might be one of the few things we can actually change.. and it's NEEDED BADLY
for these groups to actually work to our benefit. Please also feel free to copy
this message and re-post it on ALL of YOUR own groups.. as the more votes which
arrive, will mean the squeaky wheel "might actually get some grease". Starting
your own suggestion would work too.. but if big numbers show up on this link..
it might make a difference. Thanks Jerry
http://suggestions.yahoo.com/detail/?prop=groups&fid=174070
P.S. This search function here does work, it could be the new and improved.. but
vote anyway, as too many other groups don't have usable search engines. This
part need not be copied, if my message is posted on other groups. THX
Hi Kevin. I would try pulgging in a USB keyboard. There is a good chance
your keyboard has problems. I doubt this is a password problem--the
request for it will come up before you can enter the utility at all.
However, there are instructions for clearing it and also all CMOS
settings in the manual at
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c00713403/c007134\
03.pdf
on page 41. Evidently this laptop can be cleared by simply removing the
CMOS battery, which is unusual for laptops.
Ardell Faul
Computer Monitor Service Inc.
Ardell's Laptop and PC Repair
10816 E. Mission Ave.,
Spokane Valley, Wa. 99206
ardell@...
509-891-5188
Kevin wrote:
>
> Hi I recently installed a replacement mobo, hdd and keyboard to an HP
> NC4010 notebook. I now need to go into bios to set the machine to boot
> from CD so that I can install windows. However when I enter bios by
> pressing f10 I find that I can't navigate around the menus, I can only
> use up or down keys, left and right don't work. One option open to me
> in the initial menu is to reset to default settings, I tried this to
> no avail. I have also tried disconnecting the power and battery and
> pressing the start button gor 30 seconds. Could it be that the bios is
> password protected, or locked in some way and if so how do I reset it
> bearing in mind my restricted keyboard. (I have also tried 2 different
> keyboards and they both do the same)
> Any help would be greatly appreciated people!
> Kevin
>
>
Thanks for the link Ardell, I have now disconnected the CMOS battery for 15
minutes and reconnected it but unfortunately the same problem exists
Any other suggestions?
I hope the mobo isn't US as this was a replacement
> -------Original Message-------
> From: Ardell Faul <ardell@...>
> Subject: Re: [Laptop_Repair] is the bios locked?
> Sent: Nov 19 '09 14:05
>
> Hi Kevin. I would try pulgging in a USB keyboard. There is a good chance
> your keyboard has problems. I doubt this is a password problem--the
> request for it will come up before you can enter the utility at all.
> However, there are instructions for clearing it and also all CMOS
> settings in the manual at
>
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c00713403/c007134\
03.pdf
> on page 41. Evidently this laptop can be cleared by simply removing the
> CMOS battery, which is unusual for laptops.
>
> Ardell Faul
> Computer Monitor Service Inc.
> Ardell's Laptop and PC Repair
> 10816 E. Mission Ave.,
> Spokane Valley, Wa. 99206
> ardell@...
> 509-891-5188
>
>
>
> Kevin wrote:
> >
> > Hi I recently installed a replacement mobo, hdd and keyboard to an HP
> > NC4010 notebook. I now need to go into bios to set the machine to boot
> > from CD so that I can install windows. However when I enter bios by
> > pressing f10 I find that I can't navigate around the menus, I can only
> > use up or down keys, left and right don't work. One option open to me
> > in the initial menu is to reset to default settings, I tried this to
> > no avail. I have also tried disconnecting the power and battery and
> > pressing the start button gor 30 seconds. Could it be that the bios is
> > password protected, or locked in some way and if so how do I reset it
> > bearing in mind my restricted keyboard. (I have also tried 2 different
> > keyboards and they both do the same)
> > Any help would be greatly appreciated people!
> > Kevin
> >
> >
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
Thanks for the reply, I have tried using a usb keyboard but it isn't recognized
on startup. I originally thought the problem was the keyboard so have tried 2
different ones (I had access to a spare one), but exactly the same problem
arises, - i can use up down keys but not left right keys.
So I now think the problem must be with the mobo and am hoping its software
related rather than hardware.
> -------Original Message-------
> From: Ardell Faul <ardell@...>
> Subject: Re: [Laptop_Repair] is the bios locked?
> Sent: Nov 19 '09 14:05
>
> Hi Kevin. I would try pulgging in a USB keyboard. There is a good chance
> your keyboard has problems. I doubt this is a password problem--the
> request for it will come up before you can enter the utility at all.
> However, there are instructions for clearing it and also all CMOS
> settings in the manual at
>
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c00713403/c007134\
03.pdf
> on page 41. Evidently this laptop can be cleared by simply removing the
> CMOS battery, which is unusual for laptops.
>
> Ardell Faul
> Computer Monitor Service Inc.
> Ardell's Laptop and PC Repair
> 10816 E. Mission Ave.,
> Spokane Valley, Wa. 99206
> ardell@...
> 509-891-5188
>
>
>
> Kevin wrote:
> >
> > Hi I recently installed a replacement mobo, hdd and keyboard to an HP
> > NC4010 notebook. I now need to go into bios to set the machine to boot
> > from CD so that I can install windows. However when I enter bios by
> > pressing f10 I find that I can't navigate around the menus, I can only
> > use up or down keys, left and right don't work. One option open to me
> > in the initial menu is to reset to default settings, I tried this to
> > no avail. I have also tried disconnecting the power and battery and
> > pressing the start button gor 30 seconds. Could it be that the bios is
> > password protected, or locked in some way and if so how do I reset it
> > bearing in mind my restricted keyboard. (I have also tried 2 different
> > keyboards and they both do the same)
> > Any help would be greatly appreciated people!
> > Kevin
> >
> >
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
Please I need a suggestion or help on how to deal with a recent problem that pop
up two days ago.I have a Packard Bell EasyNote MH35 laptop(intel (R) Pent.(R)
Daul CPU T2310 @1.466Hz,HDD 120G,memory 893MB)that suddenly started displaying a
screen with this information (right after the Packard Bell screen):Choose an
Operating system to start,or press tab to select a tool.The operating systems
are;Earlier Version of Windows and Microsoft Window Vista.The problem is when I
choose Window Vista after about some second it brings out a screen with Logon
process Intialization Failure.Each time I select the ok button it returns to the
same screen.But, if I select the first option(Ealier Version of Window)it boot
to Window XP.What could be the reason for this and what will I do to resolve
this problem. I'm really worried.Thanks.
I strongly believe you really only have XP installed. It shows 2 operating systems because a line of text was not deleted whenever who ever installed XP did the installation. You would need to go to system properties by right clicking on my computer then going to properties, then click "advance" tab then within "startup and recovery" click settings then "edit" then you should see two lines at bottom that look something like this (multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect). Delete the bottom line only then save and close. restart and it should have only the real operating system. If it only has one line like above then you have a different issue and no changes should be made.
Stafford's Computers
--- On Fri, 11/20/09, Ogbodoh <johnsvianny@...> wrote:
From: Ogbodoh <johnsvianny@...> Subject: [Laptop_Repair] Operating System Issue To: Laptop_Repair@yahoogroups.com Date: Friday, November 20, 2009, 6:59 AM
Please I need a suggestion or help on how to deal with a recent problem that pop up two days ago.I have a Packard Bell EasyNote MH35 laptop(intel (R) Pent.(R) Daul CPU T2310 @1.466Hz,HDD 120G,memory 893MB)that suddenly started displaying a screen with this information (right after the Packard Bell screen):Choose an Operating system to start,or press tab to select a tool.The operating systems are;Earlier Version of Windows and Microsoft Window Vista.The problem is when I choose Window Vista after about some second it brings out a screen with Logon process Intialization Failure.Each time I select the ok button it returns to the same screen.But, if I select the first option(Ealier Version of Window)it boot to Window XP.What could be the reason for this and what will I do to resolve this problem. I'm really worried.Thanks.
Hi. I've got a Toshiba Satellite, model no. psaa8u-06200J. The LCD has some
problems. It's pretty dim/dark overall, and the colors aren't displayed
correctly, and there's a horizontal line across the middle of the screen. The
images are just clear enough that you can use the computer, but just barely.
When I move the screen around (light bending/flexing, opening/closing) the
display colors and brightness change a bit, although they're never correct. Any
idea what might be wrong, and what's required to fix it? Any help appreciated.
Oh, and when you attach an external monitor, it looks and works just fine.
Steve
You have a bad display. The only way to fix this problem is to replace
the display. If you want to tackle the job yourself, take the front
bezel off and you can then remove the LCD panel and on the back of it
you will find the part number.
Ardell Faul
Computer Monitor Service Inc.
Ardell's Laptop and PC Repair
10816 E. Mission Ave.,
Spokane Valley, Wa. 99206
ardell@...
509-891-5188
jacquesclouseau wrote:
>
> Hi. I've got a Toshiba Satellite, model no. psaa8u-06200J. The LCD has
> some problems. It's pretty dim/dark overall, and the colors aren't
> displayed correctly, and there's a horizontal line across the middle
> of the screen. The images are just clear enough that you can use the
> computer, but just barely.
>
> When I move the screen around (light bending/flexing, opening/closing)
> the display colors and brightness change a bit, although they're never
> correct. Any idea what might be wrong, and what's required to fix it?
> Any help appreciated.
>
> Oh, and when you attach an external monitor, it looks and works just fine.
>
> Steve
>
>
Thanks very much, Ardell. Grateful for the information.
Steve
--- In Laptop_Repair@yahoogroups.com, Ardell Faul <ardell@...> wrote:
>
> You have a bad display. The only way to fix this problem is to replace
> the display. If you want to tackle the job yourself, take the front
> bezel off and you can then remove the LCD panel and on the back of it
> you will find the part number.
>
> Ardell Faul
> Computer Monitor Service Inc.
> Ardell's Laptop and PC Repair
> 10816 E. Mission Ave.,
> Spokane Valley, Wa. 99206
> ardell@...
> 509-891-5188
>
>
>
> jacquesclouseau wrote:
> >
> > Hi. I've got a Toshiba Satellite, model no. psaa8u-06200J. The LCD has
> > some problems. It's pretty dim/dark overall, and the colors aren't
> > displayed correctly, and there's a horizontal line across the middle
> > of the screen. The images are just clear enough that you can use the
> > computer, but just barely.
> >
> > When I move the screen around (light bending/flexing, opening/closing)
> > the display colors and brightness change a bit, although they're never
> > correct. Any idea what might be wrong, and what's required to fix it?
> > Any help appreciated.
> >
> > Oh, and when you attach an external monitor, it looks and works just fine.
> >
> > Steve
> >
> >
>
hi guys , i need your help to solved my problem with Toshiba Satellite A200 , model no. PSAF6L - 0EM00J . the problem is when i try to down grade from it's original windows vista to windows xp , when i finish to down grade the os to xp , i realized that i don't have drivers for windows xp . what i want to ask you are where could i found the windows xp drivers for this notebook .
I bought a used toshiba laptop from a company that was down sizing. The biggest
problem that i am having is they set a bios password on the machine. There is a
tool that plugs into the parallell port to remove the password.Does anyone have
this tool? There is no hard drive in the laptop.
Hi all. First of all, sorry for my english... I have a very strange issue with
an aspire 1640. The laptop loads the SO correctly but the screen is dim.
Initially i thought: "Ok, this is the typical case of a bad inverter" I replaced
the inverter with a surely working one but the problem remains. So i was going
to consider the lamp as the faulty part. I tested a well known working lamp with
a new inverter but, damn, remains off. I checked the voltage on the first pin on
the inverter and i got 19 volt so it seems working. I replace the lcd cable but
again without success. My God, where is the problem? Any suggestion?
Thanks in advance
gabriele
Does the screen show any image when you first turn it on, before it goes
into Windows? Sometimes if there is a problem with the lid closure
switch, the backlight inverter will be turned off because windows thinks
the lid is closed. But that switch is only a logic level for the
controller circuitry and does not mechanically kill the inverter by
itself. So when you first turn the unit on, that logic level is not yet
decoded and the backlight wills stay on until Windows starts to load.
In general, the 19 volts you refer to is always present on the inverter,
and there are two other signal lines going to the inverter. One is an
Enable signal, which is used to turn the inverter on and off, and the
other will be a brightness controller signal. If you take a couple of
readings of the wires on the inverter, and adjust the brightness in
between taking them, you should be able to determine which is which and
go from there.
Ardell Faul
Computer Monitor Service Inc.
Ardell's Laptop and PC Repair
10816 E. Mission Ave.,
Spokane Valley, Wa. 99206
ardell@...
509-891-5188
analogicbox wrote:
>
> Hi all. First of all, sorry for my english... I have a very strange
> issue with an aspire 1640. The laptop loads the SO correctly but the
> screen is dim. Initially i thought: "Ok, this is the typical case of a
> bad inverter" I replaced the inverter with a surely working one but
> the problem remains. So i was going to consider the lamp as the faulty
> part. I tested a well known working lamp with a new inverter but,
> damn, remains off. I checked the voltage on the first pin on the
> inverter and i got 19 volt so it seems working. I replace the lcd
> cable but again without success. My God, where is the problem? Any
> suggestion?
> Thanks in advance
>
> gabriele
>
>
No. The backlight is off from the Post sequence to windows desktop. Tomorrow
i'll check all the pins on the inverter's dc plug and the lid closure as you
say hoping to understand something more. Thanks for the tips.
--- In Laptop_Repair@yahoogroups.com, Ardell Faul <ardell@...> wrote:
> Does the screen show any image when you first turn it on, before it goes
> into Windows? Sometimes if there is a problem with the lid closure
> switch, the backlight inverter will be turned off because windows thinks
> the lid is closed. But that switch is only a logic level for the
> controller circuitry and does not mechanically kill the inverter by
> itself. So when you first turn the unit on, that logic level is not yet
> decoded and the backlight wills stay on until Windows starts to load.
>
> In general, the 19 volts you refer to is always present on the inverter,
> and there are two other signal lines going to the inverter. One is an
> Enable signal, which is used to turn the inverter on and off, and the
> other will be a brightness controller signal. If you take a couple of
> readings of the wires on the inverter, and adjust the brightness in
> between taking them, you should be able to determine which is which and
> go from there.
Hi. I just have uploaded a picture of the inverter (in the Acer Aspire folder).
What you see is what i have measured. I have found the line that adjust the
screen brigtness. The fn key (F6) to switch off the display seems not to
influence any other voltage. Looks like a working inverter then, what's wrong?
Next step, I'll inspect thhe lid enclosure switch. Bye
--- In Laptop_Repair@yahoogroups.com, Ardell Faul <ardell@...> wrote:
>
> Does the screen show any image when you first turn it on, before it goes
> into Windows? Sometimes if there is a problem with the lid closure
> switch, the backlight inverter will be turned off because windows thinks
> the lid is closed. But that switch is only a logic level for the
> controller circuitry and does not mechanically kill the inverter by
> itself. So when you first turn the unit on, that logic level is not yet
> decoded and the backlight wills stay on until Windows starts to load.
>
> In general, the 19 volts you refer to is always present on the inverter,
> and there are two other signal lines going to the inverter. One is an
> Enable signal, which is used to turn the inverter on and off, and the
> other will be a brightness controller signal. If you take a couple of
> readings of the wires on the inverter, and adjust the brightness in
> between taking them, you should be able to determine which is which and
> go from there.
>
> Ardell Faul
> Computer Monitor Service Inc.
> Ardell's Laptop and PC Repair
> 10816 E. Mission Ave.,
> Spokane Valley, Wa. 99206
> ardell@...
> 509-891-5188
>
>
Hi. I have uploaded a picture of the acer inverter (in the acer aspire folder).
What you see is what i have measured. I have found the line that adjusts the
screen brightness. The FN key (F6) that swicth off the display seems not to
influence other two voltages. Then, what's wrong? Next step is to inspect the
lid closure switch. Bye
>
> --- In Laptop_Repair@yahoogroups.com, Ardell Faul <ardell@> wrote:
>
>
> > Does the screen show any image when you first turn it on, before it goes
> > into Windows? Sometimes if there is a problem with the lid closure
> > switch, the backlight inverter will be turned off because windows thinks
> > the lid is closed. But that switch is only a logic level for the
> > controller circuitry and does not mechanically kill the inverter by
> > itself. So when you first turn the unit on, that logic level is not yet
> > decoded and the backlight wills stay on until Windows starts to load.
> >
> > In general, the 19 volts you refer to is always present on the inverter,
> > and there are two other signal lines going to the inverter. One is an
> > Enable signal, which is used to turn the inverter on and off, and the
> > other will be a brightness controller signal. If you take a couple of
> > readings of the wires on the inverter, and adjust the brightness in
> > between taking them, you should be able to determine which is which and
> > go from there.
>
The best way to gain control over the enable function is to plug in an
external monitor. Then you will be able to use the Fn key plus one of
the F keys to switch between it and the LCD panel. The usual sequence is
LCD only, External Monitor only, then Both LCD and External monitor
turned ON. Once you have that under control, you should be able to see
if the Enable line on the Inverter is changing logic levels.
From what you are reporting, I am guessing that your problem is that
the Enable line from the motherboard is NOT changing states, which means
the inverter never gets turned on. The lid closure switch may be causing
this, or you may have some other problem on the motherboard which will
be difficult to track down. I have successfully bypassed this problem is
other laptops by finding another line that changes state going to the
LCD panel itself when the display is turned on and off, and "borrowing"
that logic level via a 1K resistor or so and applying it to the enable
line on the inverter. This will make the unit usable, but there will be
instances where the screen is normally blanked out that it will now turn
white instead because the inverter is not being turned off.
Ardell Faul
Computer Monitor Service Inc.
Ardell's Laptop and PC Repair
10816 E. Mission Ave.,
Spokane Valley, Wa. 99206
ardell@...
509-891-5188
analogicbox wrote:
>
> Hi. I just have uploaded a picture of the inverter (in the Acer Aspire
> folder). What you see is what i have measured. I have found the line
> that adjust the screen brigtness. The fn key (F6) to switch off the
> display seems not to influence any other voltage. Looks like a working
> inverter then, what's wrong? Next step, I'll inspect thhe lid
> enclosure switch. Bye
>
> --- In Laptop_Repair@yahoogroups.com
> <mailto:Laptop_Repair%40yahoogroups.com>, Ardell Faul <ardell@...> wrote:
> >
> > Does the screen show any image when you first turn it on, before it
> goes
> > into Windows? Sometimes if there is a problem with the lid closure
> > switch, the backlight inverter will be turned off because windows
> thinks
> > the lid is closed. But that switch is only a logic level for the
> > controller circuitry and does not mechanically kill the inverter by
> > itself. So when you first turn the unit on, that logic level is not yet
> > decoded and the backlight wills stay on until Windows starts to load.
> >
> > In general, the 19 volts you refer to is always present on the
> inverter,
> > and there are two other signal lines going to the inverter. One is an
> > Enable signal, which is used to turn the inverter on and off, and the
> > other will be a brightness controller signal. If you take a couple of
> > readings of the wires on the inverter, and adjust the brightness in
> > between taking them, you should be able to determine which is which and
> > go from there.
> >
> > Ardell Faul
> > Computer Monitor Service Inc.
> > Ardell's Laptop and PC Repair
> > 10816 E. Mission Ave.,
> > Spokane Valley, Wa. 99206
> > ardell@...
> > 509-891-5188
> >
> >
>
>
I'd be curious to know if you resolve this issue. I have a acer aspire with 1.5 inch wide violet line down the right side of my lcd. The color changes slightly when I apply slight pressure the to top cover. I suspect the board on the back of the lcd has been goofed up in some way. I was going to simply replace the lcd, when it became too annoying.
--- On Thu, 11/26/09, analogicbox <dalmak@...> wrote:
From: analogicbox <dalmak@...> Subject: [Laptop_Repair] Re: Odd problem with an Acer Aspire To: Laptop_Repair@yahoogroups.com Date: Thursday, November 26, 2009, 12:24 PM
Hi. I have uploaded a picture of the acer inverter (in the acer aspire folder). What you see is what i have measured. I have found the line that adjusts the screen brightness. The FN key (F6) that swicth off the display seems not to influence other two voltages. Then, what's wrong? Next step is to inspect the lid closure switch. Bye
>
> --- In Laptop_Repair@ yahoogroups. com, Ardell Faul <ardell@> wrote:
>
>
> > Does the screen show any image when you first turn it on, before it goes
> > into Windows? Sometimes if there is a problem with the lid closure
> > switch, the backlight inverter will be turned off because windows thinks
> > the lid is closed. But that switch is only a logic level for the
> > controller circuitry and does not mechanically kill the inverter by
> > itself. So when you first turn the unit on, that logic level is not yet
> > decoded and the backlight wills stay on until Windows starts to load.
> >
> > In general, the 19 volts you refer to is always present on the inverter,
> > and there are two other signal lines going to the inverter. One is an
> > Enable signal, which is used to turn the inverter on and off, and the
> > other will be a brightness controller signal. If you take a couple of
> > readings of the wires on the inverter, and adjust the brightness in
> > between taking them, you should be able to determine which is which and
> > go from there.
>