laptop no display on screen

Srijib

Commendable
Nov 1, 2016
7
0
1,510
0
I am able to hear the welcome sound of Windows but no display at all. the LCD works on other motherboard. I can see outputs on monitor and HDMI. what could have caused the problem please help.

Acer aspire 4736z, intel pentium T4200.
 

Srijib

Commendable
Nov 1, 2016
7
0
1,510
0

thanks for your reply, it is Acer Aspire 4736z

 

Srijib

Commendable
Nov 1, 2016
7
0
1,510
0
I am able to control the backlighting using the function key combination. I doubt if it is the on board gpu but has it been the gpu no display would have work isn't it ?
 

Srijib

Commendable
Nov 1, 2016
7
0
1,510
0
Thanks dear, for asking again, I did check before with a flashlight tilted at an angle, the light was brighter than lcd backlight hence was seeing a black screen. In order to double sure I did test again today and also I tried to check the voltage at pin 40, when trying to do so I accidentally discovered some strange thing. When the connector is fixed tight getting black screen. When I pushed one side of the connector out at an angle i.e. pin 1 side it was displaying things. Here is the link showing the connector mode when i get the display.

https://goo.gl/photos/T4nn1eYR681emv429

wondering if this is something to do with the connector, but it should work when it is tightly fixed.

I also has this problem but i was able to get it fixed by tosting the motherboard in Oven :)

http://www.tomshardware.com/answers/id-3228777/laptop-starting-problem.html
 
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