Search results

SOLVED. PPBUS was low (8.3v) turned out it was F7140

really odd one, as soon as i plug in the battery, it only comes on for a second and immediately turns off. fine with only DC power. my immediate thought was current sensing circuits but thats all ok

ignore this. on closer inspection i found slight liquid damage on Q8062 and U8180 (not sure which of the two caused the issue) but i replaced both and it's back to life!

here are the images, too large to upload here

got a 00165 here with no sign of liquid damage that can't start up all the way. it hangs on the loading screen, the bar can be fully loaded and it still won't turn all the way on. this includes my own drives and also recovery. safe mode isnt working, i've also done the usual, SMC, PRAM without...

AliExpress donor boards for your model. It’s a pain I know, but it’ll solve your problem with SMCs

Hi there! Not sure if that exists but I’m looking for a kind of all in one machine for the sake of space. Wish I could have an oscilloscope that can also replace a multimeter. I’ve looked but I don’t think this exists?

Thank you that’s really helpful. Going to build a spreadsheet with this data

thank you for that! saved me a lot of time, i would've kept going!

hey! nice new forum. i like the fact that i can now pay by card and i dont have to use paypal got a 00165 here with multiple spots of liquid damage. sorted a few issues so far, on first boot, the main issue was that L7320 was heating up. realised that PPBUS_g3h was short. i sorted that ( i...

Just checking if there's anything else I could test on this or is this a rabbit hole? thank you!

Ok, i cancelled the repair. thank you guys. I couldve wasted way more time on it haha

Really?? Is there a way I can confirm this?

Hahahaha oh no! I just realised that my initial assessment of liquid damage might be wrong. there's liquid (or oil) all around the underside of the board where it sits on the seal. Yes external video I tested as well, no sign of life (except the click on the trackpad)

have a 12 incher here, takes 20V on the charger and current is going in. In fact the touchpad also clicks. I tested with a known working display without any luck. These boards are super weird, where do i begin?

BIOS tested and no difference. is there anything else I can do?

7 & 3 of U1950 pulse too Can i try a new bios without transferring programming just to see if it works? I don't curtrently have a programmer

ALL_SYS_PWRGD pulses yes SMC bypass does nothing. it's as if i'm not even doing it. Usually the light stays off when holding down power button but the light turns on as if i wasnt pressing it. Also jsut replaced the SMC (i was feeling lucky) and has the exact same symtoms as before tested S3...

PM_SLP_S0 starts low, when triggered goes 3.3v PM_SLP_S3 starts low, when triggered goes 3.3v PM_SLP_S4 starts low, when triggered goes over 2v PM_SLP_S5 starts low, when triggered goes over to 3.3v

sometimes PM_PWRBTN_L gets stuck low continiously