Missing GFX CORE

[mnciks11]

Hello guys, kindly assist with the following:

Lenovo G480

LG485L UMA MB
12206-1
48.4WQ02.011

The board is working but not displaying

I checked the GFX CORE is missing, i have 0v on this line, i checked the chip responsible for GFX CORE for driving the mosfets so that GFX CORE will be generated, here are my findings:

Vin = 5v Ok
DRVH = 0v ?
DRVL = 0v ?
PWM = 1.78V ?
BST = 4.8v ok
SKP = 4.8v ok

What should i check next?, is the chip dead, i checked all my 2 mosfets, i even changed them with same type but still 0V on the GFX AND NO DISPLAY

[Techtiger]

Re: Missing GFX CORE

GFX core doesnt arise due to bios fault. So you should try flashing

[mcplslg123]

Re: Missing GFX CORE

this platform is known to have problematic bios. i agree with techtiger-its very likely a bios issue.

[jokophp]

Re: Missing GFX CORE

processor sandy or ivy?

[mnciks11]

Re: Missing GFX CORE

processor sandy or ivy?

I don't understand