ytesfay80
Member
The customer said there was no liquid spilled this machine. I did end up seeing very small corrosion on R5072/R5082 so I replaced them but that looks like the only area I can see liquid damage.
When I plugged in the charger I was seeing a very dim flickering green light. Now there is no green light at all. I tried with another known working dc-inboard but still the same.
When I measure F6905 and hold the probe there the voltage is constantly changing from 15.9v to around 18v. The fuse measured fine.
Next I measured U6901 and I got 0v on every pin. In diode mode I got a 0v short to ground on pin 5(PP3V42_G3H)
D6990 and pin 4 of U6990 measured around 17v.
L6995 was showing a short to ground in diode mode so I removed it to see which side the short was on and it was on Pin 2.
I measured the resistance on Pins 17/18/27/28 of U7000 and they were correct so I still went ahead and replaced U7000 but the short is still there.
What should I check next?
When I plugged in the charger I was seeing a very dim flickering green light. Now there is no green light at all. I tried with another known working dc-inboard but still the same.
When I measure F6905 and hold the probe there the voltage is constantly changing from 15.9v to around 18v. The fuse measured fine.
Next I measured U6901 and I got 0v on every pin. In diode mode I got a 0v short to ground on pin 5(PP3V42_G3H)
D6990 and pin 4 of U6990 measured around 17v.
L6995 was showing a short to ground in diode mode so I removed it to see which side the short was on and it was on Pin 2.
I measured the resistance on Pins 17/18/27/28 of U7000 and they were correct so I still went ahead and replaced U7000 but the short is still there.
What should I check next?
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