lenovo g500 black screen

[Anethra]

healthy days everyone. i have a g500 laptop on my desk. first of no have to screen at laptop so, i reball to gpu and taking screen but screen showing just black. after i try few bios and original bios from lenovo site, unfortunately same problem. last of i changed uma to mb but doesn't any change. can anyone give me some ideas on what to do?

mb. model la-9631p rev:1.0

[mcplslg123]

Re: lenovo g500 black screen

Display ok on external monitor??

[Anethra]

Re: lenovo g500 black screen

Display ok on external monitor??

no image on external monitor

[emestee]

Re: lenovo g500 black screen

Why did you reball the GPU? This is absolutely not a thing you should be doing.

You need to diagnose the board. "Black screen" doesn't mean anything. Does the board respond to the power button? Do all voltages go up? Do POST codes run? Does the display backlight power up? If you press num lock or caps lock several times, do the lights go up and down?

[Anethra]

Re: lenovo g500 black screen

Why did you reball the GPU? This is absolutely not a thing you should be doing.

You need to diagnose the board. "Black screen" doesn't mean anything. Does the board respond to the power button? Do all voltages go up? Do POST codes run? Does the display backlight power up? If you press num lock or caps lock several times, do the lights go up and down?

I guess I couldn't explain enough. sorry about that. i mean to with "black screen" backlight and panel light up but just black. gpu, cpu, pch voltage all good. no backlight and panel light before reball. anyway i discovered somethink new. when i wiggle the cable the image is also distorted. i will try with new cable. i'll write if there is any improvement