820-2330 main rails voltages nighmare
I got stuck with a board 820-2330 no water damage, no visual damaged components, excellent physical condition. Did not have green light, PP3V42_G3H was shorted. The problem was U5727 which I replaced. Got the PP3V42_G3H back and green light on, but still not turning on. PPBUS_G3H was present, PP3V3_S5 was present but PP5V_S3 was missing. So I decided to replace U7201. After that, I lost the green light even when PP3V42_G3H was still present, PP5V_S3 was still missing and on top of that I lost PPBUS_G3H /not completely but it's only 1.7-1.8V/. This board for some reason has very complicated 1-wire circuit. I'll appreciate any tips. Thanks
Questa è una buona domanda?