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-=SOMETIMES chimes. Usually doesn't. I'm mostly sure both speakers were hooked up but only the Left side (LIO side) sounded when it did chime=- It does not seem to detect the headphones. System Information has no entry under audio device. PP1V5_S0SW_AUDIO_HDA - 1.5 PP5V_S3_U6210 - 5V (what a...

The situation as of now is I press the power button (on it's button board connected to con5602) and I get a red light from PWR_LED but no other activity. PWR_SW goes low and PM_PWRBTN stays high. Current draw stays the same and nothing heats up above normal. Is this the EC? Should I be looking...

Typo, it was in my brain. I know which one to short, but typing all this out gets confusing. Can you or someone please skim post #7 again without my inadvertent distraction?

Well I reassembled it to wait for the new battery but now it doesn't power on from the AC. It gets all the way past PM_RSMRST, ME_AC_PRESENT, and SUSWARN, but when I short PWR_SW no action happens, no extra current drawn seemingly. Super IO is bad? what have i done to my boy?!

OK I have updated the main post, it's probably just a dead battery, but can anyone tell me about D8801 being low on pin 3? Is that right? It measures 3.1 and 19.6 on the anodes but 19.3 on the cathode, there doesn't seem to be any reason for it to be pulled down, but this schematic is labelled...

Edit discard this I think I may have made a mistake in my initial post. EDIT 2 YEP I REALLY DID. Changing Q8802 and all the rest right now to it's default state (minus the shorted fets) and remeasuring. Continue to ignore, i'll reply when I've fixed my initial post.

boardview and schematics I've been using in case. edit: files are too large to share. I found them on Electronics Repair School's Discord by searching P5NCN

Hello, I’m troubleshooting a rather nice gaming laptop with a battery issue i can’t seem to figure out. It does not charge the battery though it seems like it’s attempting to. I found both high and low side PHASE fets shorted internally, replaced them with WHAT I THINK is are equivalents (og =...

Like is there a specific resistor or coil like we used to be able to do on the 820-2915 Does the MacBook need the GPU to enter Target mode?

Ah nuts. Okay I was pretty thorough, glad to have it confirmed. Thanks again.

This machine came from a different shop. Damage to UA600 and nearby PP5V_G3S support. Replaced chip, resistors, cleaned traces, verified continuity and, found 5V present on PP5V_G3S and GPU_COREREG. Damage near SSD0 components as ususal but no shorts. I lifted the controller to check even...

I'll go over the intel steps again, i think it was all there maybe not is there anything else I can try before data go bye bye

sadly they want the data if possible.

Correct, gpu no pulse too

looked it over again, no missing anything that I can see No pulses on PPVCCGT, CPUCORE, PPVCC_CPU, PPVCORE using oscilloscope (battery disconnected. same result with batt connected) PPBUS actually is rising from 12.6 to 13V before the adapter resets and 20V is negotiated again with my tester...

Customer Says: "Replaced battery now it doesn't start up." Sure enough it was an amazon battery, I've got a genuine working one on the bench right now. 3V3_G3H - Present 3V3_G3H_RTC - Present 5VG3S - Present AWAKE - All present SLPS2R - All present ALL_SYS_PWRGD - not present SSD 2.5 - Present...

I could not get the charging function fixed. The customer is tired of waiting for my ass, maybe i can buy it off him and use it as a "known good" donor for all but the charging system The laptop powers on and works perfectly with the manually charged battery. The destroyed lid sensor works...

Thank you, I will continue doing DFU things with another mac.

Going through power on sequence, everything is present seemingly until . . . PMU_Active_Ready : 1.8V pp3v3_g3h: 3.24V "<Calpe VOUT_RTC internal switch opens>" p3v3main_pgood: 0v Is this a T2 thing? Should I keep messing with DFU? Flash the t2 rom?

1v8_slps2r is present in all the places I expect it to be. : I measured on pin 27 of j6600 and both the cd3217s. Any other ideas? It should get 20v without a working battery right? Found the battery flex copper was split, so i replaced it too but still no love.