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
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
Attached Files
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