IndiaReFix - Laptop & TV Repair Forum

Case study
Lenovo g50-30
Problem no display
After checking found 3 volt and 5 volt OK
bios ic pin 8 (1.8) ok
No ram volt
No vrm volt
No gfx volt
Solution first reprogram bios bus same condition than reflow full board by hot air gun. After getting normal temperature check volt again without ram and heat cpu core volt ok
Ram volt 1.5 ok
Looking all volt and signal ok
Again put ram back and check display
Laptop working fi9...

[ Post made via Android ]

[ Post made via Android ]

sir bios 8 pin 1.8 v bios ok sir how?

Bios 3v

[ Post made via Android ]

Sorry bios 8 pin 3v

[ Post made via Android ]

bios model ic 25Q64xxx 1.8v

[ Post made via Android ]

If the bios is 1.8v so it is think the laptop should use ddrl
So the ram voltage is 1.35
Maybe it can support both
Nice job

[ Post made via Android ]

sir bios 8 pin 1.8 v bios ok sir how?
i think bios 8 pin volt -3.3v

yes i support your job . sir nice

thanks

and after one day the problem will be back again this is not a solution