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Sharky...?

R8151 pad 1 was corroded. Missed this. Only issue on ASD is TCon verification test 12016 Error. Anyone know what this is? Has to do with the display tests. Mac appears to function fine.

820-3437 with moisture damage. Light, no fan. Board worked on previously - SMC reworked. No history on this repair. Believe this damage came after previous repair. S0 Rail PGOOD - Q8150 area corrosion. Pad for pin 1 of R8156 burnt away. Removed and cleaned up. Plugged board in to watch for...

No Title See image for R7006. I've had this resistor be the issue with a lot of MBA's. Some even with the light. I always start there to see what I'm getting...

No Title Added the fan and thermal interface tests and looped for an hour - no issues. Is this just from repeatedly stressing without a break? Anyone able to run the same sensor only test on loop and see?

Getting back to this board.. I'm getting a green light then amber, no fan. Check R7006 for V and immediately get fan spin for 12 seconds on, off, 12 seconds on, off - USB mouse light on the whole time until i remove probes. Same with R7005. Same with meter off. Hit the SMC with some heat/ flux...

This is a customers computer in near perfect condition with 170 cycle count. Brought in for preventative maintenance (blow out dust, thermal paste, stress test). Passed 11hrs + of looping ASD, all tests. Apple recommends this for stress testing. However, when looping just the Sensor Group (load)...

MacBook had liquid damage, fan spun with MagSafe. Replaced corroded J9500 to get SYS_ONEWIRE and light back. Fan spins up to high immediately only on power supply or magsafe but doesn't actually turn on. CPU VCORE is present and CPU gets warm. No boot in min config either. Slight corrosion...

The Retina (4K) came out in late 2015. 2014 should be the standard 2K res.

Replaced Q7055 and ISL.. nothing. Tried a new battery.. same. I noticed that if I switched from the power supply to a MagSafe (or between chargers), the light wouldn't come on until an SMC reset. Decided to try another ISL.. that was it. Third one was the charm. Works with all chargers and both...

Will replace Q7055 and get back.. Any way of testing before replacing or is this a common known failure point?

I second phuketmymac. The 2015s have a cable that runs over the battery and between the case. This commonly fails due to the MacBook being held with 1 hand and also from small particles becoming stuck to the flex cable tape underneath and pressing into the cable. I see this about 1-2 times a...

Thanks for the quick response. 27/28 is at 20.4 O. 17/18 is at 3.2 O. R7051 - 2.4 O, R7052 - 0.3 O. Used multiple chargers and power supply. Known good DC IN board. Is C7025 measuring 0.175v to G on pin 2 normal?

Received this machine with no magsafe light and no power. G3Hot was present, SYS_ONEWIRE was all good. C6992 corroded but tested fine. Replaced and got a light but still no power. R5491 / R5492 corroded and resistance was 180-200k on pins 4&6 of Q5490. Power in, but not out pin 3. Replaced all...