Check diode mode to ground on D9701 pins w/ and w/o LCD connected.
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820-3332 no video/backlight
- Thread starter Bouba148
- Start date
Bouba148
New member
JohnB8812 :
Yes resoldered the pins with good flux and solder
2informaticos:
In diode mode without LCD Connected:
D9701 to gnd:
Pin1: 0.880V Pin2: 1.191V
and the same reading with LCD Connected:
Yes resoldered the pins with good flux and solder
2informaticos:
In diode mode without LCD Connected:
D9701 to gnd:
Pin1: 0.880V Pin2: 1.191V
and the same reading with LCD Connected:
Are these diode mode readings with red probe at ground?
PPBUS_S0_LCDBKLT_FUSED is practically same as PPBUS_G3H.
Did you note PPBUS_G3H fluctuating too???
PPBUS_S0_LCDBKLT_FUSED is practically same as PPBUS_G3H.
Did you note PPBUS_G3H fluctuating too???
Change the fuse then...
Bouba148
New member
Hi 2Informaticos,
you were right the fuse was blown again, so I replaced it.
After what PPVOUT_SW_LCDBKLT was mesuring 55V which means that the backlight boost circuit is working.
I've tried a spare lcd: worked fine
So I disassembled the faulty LCD, then I've found that it had a WD + burn and broken and missing PPVOUT_SW_LCDBKLT pin on the LCD connector.
See attached pictures.
Maybe I can try to fix it.......
Thank you
you were right the fuse was blown again, so I replaced it.
After what PPVOUT_SW_LCDBKLT was mesuring 55V which means that the backlight boost circuit is working.
I've tried a spare lcd: worked fine
So I disassembled the faulty LCD, then I've found that it had a WD + burn and broken and missing PPVOUT_SW_LCDBKLT pin on the LCD connector.
See attached pictures.
Maybe I can try to fix it.......
Thank you
You can try, nothing to lose before trash it...