ytesfay80
Member
I have this 820-3437 Board that had liquid damage around the 3v42 area and some other areas around the cpu by the fan connector.
I replaced all the components in those areas and I get a light on the charger now but for some reason PPBUS_G3H was only around 3v. I ended up realizing that g3h was shorted to ground in diode mode and when I removed L7130 the short was only on Pin 2 side so I tracked it down to a couple of capacitors that were next to the cpu. I put the coil on and still no change in voltage on ppbus g3h. I checked again and saw that L7130 was shorted to ground and when I removed it the short was gone for some reason.
I put two more L7130s from donor boards and each time I put them on the short appears.
This is something I haven't seen before so do you know what else could be causing this. I already replaced F7140 and that measures fine.
I replaced all the components in those areas and I get a light on the charger now but for some reason PPBUS_G3H was only around 3v. I ended up realizing that g3h was shorted to ground in diode mode and when I removed L7130 the short was only on Pin 2 side so I tracked it down to a couple of capacitors that were next to the cpu. I put the coil on and still no change in voltage on ppbus g3h. I checked again and saw that L7130 was shorted to ground and when I removed it the short was gone for some reason.
I put two more L7130s from donor boards and each time I put them on the short appears.
This is something I haven't seen before so do you know what else could be causing this. I already replaced F7140 and that measures fine.