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Screen randomly blank, system responsive, backlight on

Last response: in Graphics & Displays
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October 12, 2009 2:02:12 PM

Maybe this is something simple...or maybe that's wishful thinking.

Toshiba A135-S4407 notebook. The screen will randomly go black, with the TFT back-light still on, only when on battery power, but absolutely nothing else is affected. I have been listening to music when it happens, the music doesn't skip, system is still 100% responsive and unaffected. Closing the screen, pressing buttons, clicking/moving the mouse/touch pad doesn't do a thing. When on battery power, I have the power button configured to go into standby/sleep when pressed, this is the only thing that works to bring it right back, press that, the system nearly instantly goes to sleep as normal, and then click again, comes back to life, screen pops right on. It tends to happen about twice through one cycle usage of the battery, so, once every 45 mins or so.

Possibly applicable video/graphics information:

Intel(R) Graphics Media Accelerator Driver for Mobile Report

Report Date: 10/12/2009
Report Time[hr:mm:ss]: 09:59:32
Driver Version: 7.14.10.1437
Operating System: Windows Vista (TM) Home Premium* , Service Pack 2 (6.0.6002)
Default Language: English
DirectX* Version: 10.0
Physical Memory: 2037 MB
Minimum Graphics Memory: 8 MB
Maximum Graphics Memory: 256 MB
Graphics Memory in Use: 68 MB
Processor: x86 family 6 Model 14 Stepping 12
Processor Speed: 1729 MHZ
Vendor ID: 8086
Device ID: 27A2
Device Revision: 03


* Accelerator Information *

Accelerator in Use: Mobile Intel(R) 945 Express Chipset Family
Video BIOS: 1377
Current Graphics Mode: 1280 by 800 True Color (59 Hz)



* Devices Connected to the Graphics Accelerator *


Active Notebook Displays: 1


* Notebook *

Monitor Name: Generic PnP Monitor
Display Type: Digital
Gamma Value: 2.20
DDC2 Protocol: Supported
Maximum Image Size: Horizontal: Not Available
Vertical: Not Available
Monitor Supported Modes:
1280 by 800 (60 Hz)
Display Power Management Support:
Standby Mode: Not Supported
Suspend Mode: Not Supported
Active Off Mode: Not Supported
January 26, 2010 4:11:30 PM

nonotme42 said:
Maybe this is something simple...or maybe that's wishful thinking.

Toshiba A135-S4407 notebook. The screen will randomly go black, with the TFT back-light still on, only when on battery power, but absolutely nothing else is affected. I have been listening to music when it happens, the music doesn't skip, system is still 100% responsive and unaffected. Closing the screen, pressing buttons, clicking/moving the mouse/touch pad doesn't do a thing. When on battery power, I have the power button configured to go into standby/sleep when pressed, this is the only thing that works to bring it right back, press that, the system nearly instantly goes to sleep as normal, and then click again, comes back to life, screen pops right on. It tends to happen about twice through one cycle usage of the battery, so, once every 45 mins or so.

Possibly applicable video/graphics information:

Intel(R) Graphics Media Accelerator Driver for Mobile Report

Report Date: 10/12/2009
Report Time[hr:mm:ss]: 09:59:32
Driver Version: 7.14.10.1437
Operating System: Windows Vista (TM) Home Premium* , Service Pack 2 (6.0.6002)
Default Language: English
DirectX* Version: 10.0
Physical Memory: 2037 MB
Minimum Graphics Memory: 8 MB
Maximum Graphics Memory: 256 MB
Graphics Memory in Use: 68 MB
Processor: x86 family 6 Model 14 Stepping 12
Processor Speed: 1729 MHZ
Vendor ID: 8086
Device ID: 27A2
Device Revision: 03


* Accelerator Information *

Accelerator in Use: Mobile Intel(R) 945 Express Chipset Family
Video BIOS: 1377
Current Graphics Mode: 1280 by 800 True Color (59 Hz)



* Devices Connected to the Graphics Accelerator *


Active Notebook Displays: 1


* Notebook *

Monitor Name: Generic PnP Monitor
Display Type: Digital
Gamma Value: 2.20
DDC2 Protocol: Supported
Maximum Image Size: Horizontal: Not Available
Vertical: Not Available
Monitor Supported Modes:
1280 by 800 (60 Hz)
Display Power Management Support:
Standby Mode: Not Supported
Suspend Mode: Not Supported
Active Off Mode: Not Supported



Hey nonotme42,

I think i found the solution to your problem. Researching i found out that most commun problem with monitors is the backlight on your monitor. In most cases it is the screen inverter. This is what i discovered about some screen backlight failure symptoms that could be related to a bad inverter board.

1- Latop boots as usual but after a few seconds the screen blacks out.
2-you can still see an image on the screen but it is very dim.
3- you might use a flashlight to see it better.

source: www.laptoprepair101.com

if you experience something like this, i suggest to visit this web site and start searching in EBay how much would cost your new inverter board depending on your monitor especifications. I Had the same problem with my notebook inspiron 1525/1526 and i ended up buying a new inverter board. I found mine for $30 through a company called E-smart from Dallas TX.

If this doesn't fix the problem, you better buy a brand new monitor because the cause is your monitor's backlight. It very difficult to replace and in all cases you end it up replacing your monitor anyway.

Good Luck! and hope it helps you!

mianmase


-----I just received my new inverter board for my Inpiron 1525/1526 and i changed it myself. It was not difficult and my monitor works!!!!!! i fixed my problem. I really recommend to do this if you are having the same problems that i had with my notebook and you can not find a cure after trying everything else.

Good Luck!!!!

bye!!!
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February 2, 2010 11:19:36 AM

Actually. This screen will just change colors, Generally black out, green, pink or blue...and stay there until I reset the video (generally, I just pop it in standby, and pop it back out for a quick solution.)

Mind you, it does this ONLY on battery power.
m
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February 2, 2010 2:14:34 PM

update your video card drivers
m
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!