presence of resistor @ PR425 confirmed
voltage each : pin1 = 0V pin2=2,74
PR425: black wire to pin 1 and red wire to pin2 = 99,6k
black wire to pin 2 and red wire to pin1 = 287k
yes both side of pr425 are 0V
it look like pr425 pin1 is not connected to pu402 pin 16 REGN
REGN voltage is 5,99V
all power remove and metter in resistance mode
metter red probe to pr425 pin 1 and black prob to IC pin 16 (REGN) it show me OL
Can you check the resistance to ground of PR425, pin #1?
I used my own (PDF) schematic for this review from a paid service.
Can you confirm that your CAD file shows the same? The partial boardview seems to agree with what I see here. REGN should be connected to pin #1 of PR425.
That is, if this pull-up voltage is missing, you could apply a wire from REGN to this PR425 pin #1. Just want to be 100% sure that your board is the same.
Can you see any damaged trace from PR425 pin #1? Worth to review and trace this connection and then use a piece of wire.
Sounds like that there is a broken PCB trace between the referenced pins.
Strange that it was working before with out this connection.
the resistance to ground of PR425, pin #1 IS OL
i confirm that in cad file PR425 pin1 is connected to REGN
i don't see any damage trace near pr425 and pu402
Maybe before this connection was not broken
i don't see any damage trace near pr425 and pu402
Maybe before this connection was not broken
Maybe small liquid spill from before and it just happened to break now, it is a high (well, in laptop terms) voltage circuit.
Originally posted by PeteS in CA
Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
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