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U7090 8: 14.98V R7095: 230kO PIN 2: 1.25V R7096: 190 kO C7094: 0.215 uF L7095: PIN 2: 2.82V No short: diode mode: 0.312V at L7095

yes delete this thread please my error

No green light, no fan spin. PPBUS_G3H: 8.19 V U7100 1: 0V 2: 14.71 3: 3.98 9:0.03 12: 2.76 13: 0 14: 2.65-2.73 15: 0.05 V 17: 8.19 18: 8.15 17-18 RES: 3.4 O 19: 5.10 20: 5.08 27: 14.57 28: 14.57 27-28 RES: 20 O R7180: PIN 1 14.58V No getting PP3V42_G3H so no power to SMC? U7090 6...

No green light, no fan spin. PPBUS_G3H: 8.19 V U7100 1: 0V 2: 14.71 3: 3.98 9:0.03 10: 2.74 11:2.74 12: 2.76 13: 0 14: 2.65-2.73 <--- SMC_BC_ACOK 15: 0.05 V 17: 8.19 18: 8.15 17-18 RES: 3.4 O 19: 5.10 20: 5.08 27: 14.57 28: 14.57 27-28 RES: 20 O R7180: PIN 1 14.58V Change U7100? U7090...

replaced U7400 fixed!

I think this U7400 is f'd 12: 5.14 V 16: 0 17: 0 18: 0 19: 0 20: 0.029 12: 5.14 DIODE: 1: short 3: short 4: GND 16: SHORT 17: SHORT There is hardly any solder (almost none) at 16 and 17, all corroded away.

PP3V3_SUS: 3.345V PP3V3_S5: 3.346V at R2042 PM_SLP_S4_L measured at R8111 pin 1: 3.335

Green light No fan spin No water damage Board just "suddenly would not turn on" PP1V2_S3 = 0 V U7400 with lots of white corrosion L7430: 0.30 V on diode mode to ground PP5V5_S5: 5.5V change U7400?

OK reflashed from MEDUSA backup and then reset NVRAM. Seem to now boot into OS Weird but on boot it looks like it is still installing the OS Says "10 minutes remaining" and then booted into OS. Not sure if that is due to the reflash. I can reclean the ME region again with the Medusa. The CPU...

Me region cleaned using medusa now mac gets to apple logo, stuck at like about 5%, never gets to OS cpu immediately heats up, super hot is this a mosfet issue CPU heating up within 15 -30 seconds

FYI U5660 Pin 6: 0V on diode mode to ground R5663 is 13K (schematic says 20K) R5661: 15K (schematic says 27K) R5662: 1 K R5666: 0.4 R5668: 0.4

Ok Thank You

OK I just did that Fan instantly dropped to normal speed at around ~1200 Seems to run fine. Ran fine for 2 hours testing. Any thing else you can think of to try? I was hoping to avoid an SMC reball etc. SMC reflow? ASD (EFI) shows no SMC error. AIRFLOW TEMP sensor shows at 128C Could this...

OK Replaced U5810 U5620 Re-seated all keyboard/trackpad connectors. Did an SMC reset Still have fan at 6300 Airflow TEMP: 128 BAT SENSOR temps: 128 Machine boots into OS Fan starts slow and as the OS appears the fan ramps up to max speed and stays there.

Yes, just replaced the trackpad connector. No change. Still boots into OS fine. Fan starts slow and just ramps up to MAX 6800 RPM. Battery temps 129C in HWMonitor I used a trackpad connector from a donor board. I now am looking at: U5810 SMC

FYI this is the connector now. Looks OK...

Slowly increases

Yes I did EFI diagnostics: no errors except for battery missing (unplugged) I checked: J4800 looks good J9500 looks good J4800 Diode voltage to ground 16: .71 17: .71 Now I'm wondering if I should just replace U5800 but CPU is on other side of board which makes me nervous. U5810? <-----...

OK webcam disconnected. New trackpad. Boots into OS. Still high fan. I am willing to start over and see what I have missed. I know this one can be solved. 1) Buy another DC-in board? 2) are there any sensors that are on the board that feed battery temp data? 3) trackpad connector? 1...

Well, I cleaned the ME region Went well. Boot up into Catalina but the Battery Temps are back up to 129 C in Hardware monitor Fan : 6200 All other temps normal. I had put in a known working used trackpad. Maybe I will put in a brand new trackpad and see if that works. The trackpad sensor may...