820-3660-03 Dim green light, no PPBUS_G3H

Daniel524

New member
Hi,

On an original AC I get just a dim green light, no voltage on PPBUS_G3H

~16.5V on both pin 4 + 5 of Q7010, ~0.2mV on drain

I've replaced Q7010 with same result.

Running off of bench power initially saw a quarter fan spin (Hasn't happened since) and only drawing 0.18A, also initially saw ~10V on the drain of Q7010 but slowly dropped and hasn't come back.

Not sure what other information would imediately help, any pointers appreciated.
 
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Daniel524

New member
Sorry for the confusion there, it certainly is a 3662
I wasn't getting anything on PP3V42 on bench power either.
It was left with me for issues not powering up, had liquid damage around the thunderbolt and USB port

Thanks
 
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Daniel524

New member
Q7010 - 18.17V Pin 4, 18.46V Pin 5, 0V Pin 1 (Sorry, should have been 0.2mV in my original post, not 0.2V)
D7005 - 0V Pin 1, Pin 2, Pin 3

I'm assuming the cold temperature this morning could explain the small discrepancy from yesterdays readings
 

Daniel524

New member
18.2V on both sides of R7011, I'll look for a replacement zener for D7010, hopefully have a donor here.

Thanks Duke!
 
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