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Maybe some crap under U7800 on the left side or under T2 chip?

Thank you for the reply 2informaticos. R7900 is no stuff for me but pin 1 is at 0.610-0.620v Coils diode mode: L7806 = 0.007v L7815 = 0.248v L7814 = 0.248v L7816 = 0.032v L7817 = 0.032v L7813 = 0.364v L7819 = 0.448v L7820 = 0.454v L7822 = 0.440v L7821 = 0.442v L7823 = 0.362v L7824 = 0.347v...

C7910 Pin 1 - LDO_Core = 1.463v C7905 Pin 1 - LDO0 - PP0v8_SLPS2R = 0.00v C7906 Pin 1 - LDO1 - PP3v3_G3H = 0.00v C7914 Pin 1 - LDO2 - PP1V2_AWAKE = 0.00v C7911 Pin 1 - LDO3 - PMU_LD)3_OUT = 1.80v

0v on the coils around U7800

Hi, I have a liquid damaged 820-01958 that is stuck at 5v with 0a PPBUS_G3H:12.21v PPDCIN_G3H: 5.16v PP5V_G3S: 0v PP5V_S5_LDO:0v PP3V3_G3H: 0.949v PP3V3_G3H_RTC: 3.269v PP1V8_G3S: 0v Any help would be really appreciated

Well thats weird. I connected the battery and charger but not J6951, booted to MacOS and logged in. I connected J6951 but it didn't see the battery I left it all connected and hit restart, on once restarted, it sees the battery and is charging it. PPBUS_G3H on F7000 very slowly creeped up to...

No, the MacBook came in with a non genuine battery but that seems to work. No history of liquid etc. Just wouldn't power on one day apparently. I disconnected the battery and tried with just the charger and it turned on as if nothing had happened. reconnected the battery and two others and it...

Yes I get 3.344v for 3v3_g3h on battery alone Yes I forgot to mention I checked R7021/22 and they're both as 1.3 ohms J6951 looks clean inside and around it

Thank you for the reply 2informaticos. R6905 is reading 2.5 ohms while on the board On a known good board, my multimeter shows 2.5 on that one also so I think my meter is just slightly out

Hello, I'm stuck as I have an A1708 which powers up fine on the charger alone but won't boot if the battery is connected. I've tried a known good battery but still no change. On USBC alone, F7000 is 13v On Battery and USBC F7000 climbs from 11v to 12.96v and drops back in a cycle roughly every...

Yeah works on 2 ports with an 87w charger. Hadn't noticed the one I was testing with was a 61w version. On one of the ports its fine with the USBC plug turned upside down but not the other orientation. On another port, I get 5v only with the plug one way round and 0v the other way. I've tried...

I have an 820-00928 that when plugged in jumps from 5v to 20v and pulls up to 1.8a but then reboots the charger back to 0.2a. The screen shows the battery and then goes off again when the charger drops back to 0.2a Does this on all 4 ports. I've checked U3100, U3200, UB300, UB400 and the main...

Replaced U3100 today and the low resistance went away, the MacBook works perfectly now. Thank you for your help as always 2informaticos.

UB300 & UB400 seem fine and they're similar to each other

For U3100: C3108 - PP3V3_UPC_XA_LDO is only 0.021v C3104 - PP1V5_UPC_XA_LDO_CORE is only 0.019v but for U3200, the same caps are around 0.453v So U3100 is the problem?

Hello, I have an 820-01700 that won't power on. No signs of liquid. Just stopped charging. With the board out, on 3 of the ports I get 5.12v 0.37-0.39a and the 4th port (left side front) I get 5.14v but only 0.13a. With the 3 ports I get 12.2v constant on PPBUS but 0v on the low port. If I...

Hi 2informaticos, Thank you for the quick reply. I just sorted it thankfully. It tested as low ohms on PPVOUT_S0_LCDBKLT so I decided to inject 5v into that line and have a look on FLIR The issue was with capacitor C8470 shorting. Replaced and now works fine. I was having an off day obviously...

I have an 820-00840 with no backlight. Tried multiple screens but no difference. Took the board out and it seems that Q8400 is getting its 12.9v PPVIN on pin 4 but the hate voltage is also 12.9v on pin 3 so isn't opening. I can't seem to figure out why pin 3 isn't dropping. The resistance...

Yeah, no access to AST though unless you're Apple Technician

Bluetooth Apple keyboard from an iMac works fine. Haven't tried a USB one. I thought about replacing the trackpad also but this keyboard was "a new part" from a supplier rather than a specific machine. I've installed Karabiner and that has got them working but its not the best solution long...