after bios boot laptop goes black

Sony / Vgn ar190g
June 4, 2012 at 07:10:48
Specs: Windows XPMCE, dual 2.0/ 1GB
i have a sony vgn-ar190g
it worked always good, a few weeks ago i experienced when i let it on over night, the next day it was frozen.
so i had to hold the power button to turn it off
three day ago i had the same problem while i was working i pressed ESC and the screen went black since today i found time to reinstall windows with the original discs of my laptop
it went all fine it reinstalled a was able to see the whole process, then when it started windows i saw the logo for a few seconds and then the screen went black.
also while the laptop was booting in bios the VIAO logo was in a redish backround and the screen had lines like a bad printer

please help

my guess would be the gfx card


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June 5, 2012 at 04:23:35
Your guess is most likely correct. Faulty graphics card.

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June 5, 2012 at 08:31:23
After my laptop was working ok
I mean i desabled the gfx card and i was able to the screen with the wired backround
I had on over night, be ause i downloaded my files from carbonite
Today i open the lid and it was black again
So i thought it restarted and went back to the old settings
No, now you can see even bios or the vaio startup logo

Any idea the video card according to sony is over $600
I found online a card for $40 question is is it the same
I have a nvidia geforce go7600gt and the one from the web is geforce go 7600T-N-A2

Any help if i can use it?


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June 5, 2012 at 12:52:18
Problems with the software on the hard drive CANNOT cause video problems while booting the computer BEFORE Windows loads, or in the bios Setup. That can only be caused by a hardware problem.

Have you, or is it possible someone else who had access to this computer...
- dropped it, or dropped anything on it, or otherwise exposed it to a physical jolt ?
- spilled liquid on it, or sprayed it with liquid, or exposed it to liquid such as rain ?

Since the video last worked properly all the time, has there been a power failure event that happened while the AC adapter was plugged in ?

Those things are the most frequent reasons something inside the laptop has been damaged.

The most common reasons for your video symptoms are......
- there is something wrong with the built in display assembly (see above for the common causes of that)
- or with the backlight for it,
- or with the votage inverter that supplies high voltage to the backlight
- or wiring is damaged between the display assembly and the video adapter.

Usually there's nothing wrong with the video adapter and the display is fine on an external monitor.

Try connecting an external monitor to it.

Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.

See response 1:

DO NOT plug in or unplug a monitor's video cable into / from a video port while the computer is running. Doing so can damage the monitor's circuits and/or the video adapter's circuits.

Some laptops will display on an external monitor without you having to do anything.

If you get no video on an external monitor, some laptops have a key combo that you must press to toggle the display to external video only / built in display video only / sometimes both - see the Owner's or User's manual for the model (e.g. press both Fn and Fx ; x is a number).

In this case those keys are Fn and F7.

If you get video symptoms on an external monitor too, your video adapter IS damaged or defective.

In most cases, except for high end more expensive computers, the video adapter on a laptop or netbook is NOT on a removable card - it's built into the mboard.

In that case you have to replace the mboard to replace the video adapter.

Apparently, the Sony VGN-AR series has at least three possible mboards, only one of which, so far, has a removable video adapter on a card that plugs into it.

"Processor•Type : Intel® Core™ Duo Processor T2500 "

Intel® Core™ Duo Processor T2500
(2M Cache, 2.00 GHz, 667 MHz FSB)

Sockets Supported PBGA479, PPGA478

The mboard must have Socket 478 or 479

MBX-176 VGN AR Series laptop motherboard mainboard

Graphics Card Type: Integrated

Socket 754

100% Fully Tested MBX-176 M611 laptop motherboard for VGN-AR PM965 non-integrated DDR2

Graphics Card Type: Non-Integrated

Socket 478

Laptop motherboard for VGN-AR LAPTOP MOTHERBOARD A1314342A MBX-176

Socket 478


Sony VAIO AR190G Notebook (home support page)

Has a built in blu-ray optical drive
integrated NTSC TV tuner
NVIDIA® GeForce® Go 7 series graphics and GDDR3 memory deliver advanced graphics performance


•Processor : NVIDIA® GeForce® Go 7600GT, NVIDIA® GeForce® Go 7600
•Video RAM : 128MB
•Chipset : Intel® 945PM
•Interface : VGA out w/ Smart Display Sensor, HDMI™ out and S-Video out
•TV Tuner : Yes (NTSC)

Processor•Type : Intel® Core™ Duo Processor T2500

Mobile Intel® 945PM Express Chipset

Product Name Intel® 82945PM Memory Controller

Integrated Graphics No
Dual Independent Display No
Graphics Output None

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Related Solutions

June 5, 2012 at 13:43:02
No free service manuals found yet.

$5.99 here

Search the web page for: VGN-AR190G

$19.50 and up here:

$12.99 here:

Search for : VGN-AR190G in the Search box

It says there:

"Covers all of the following models:


Searching the web with one of the other models listed and service manual may yield a free service manual

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