820-3115-B - Q7030 is burning..

[Davis]

No light indication on magsafe, no fan spin, measurements getting crazy up and down on all, I replaced the ILS U7000 twice and not much changed, I did noticed that Q7030 gets realy hot and when adding ipa to it i can see that its pulsing, I changed it to with no changes.
since i cant relay on the measurements I have no clue what causes this issue, but what can make Q7030 heat up so much?

 

[dukefawks]

Check for a short on PPBUS first. If that is ok, replace Q7030, Q7035 and the ISL6259.

 

[Davis]

Check for a short on PPBUS first. If that is ok, replace Q7030, Q7035 and the ISL6259.

ok so i replaced the Q7035 and bingo got green light and fan spinning though the system can't se the battery no orange light and i get error on ASD sensor voltage VPOR or VP0R PBus sensor is reading below the low limit.

 

[dukefawks]

What is your PPBUS voltage 12.3 or 12.56?
Check around Q5480 and Q5490 for corrosion, they are the voltage sensors.