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Thank you for the offer, John! I just found and downloaded the files, was surprised how easy it was this time, got lucky I guess. Back to work, how do you measure backlight enable if it is underneath, as you have to connect the screen. Unless I am supposed to have a loose screen and battery to...

I use an 820-3462.pdf and .brd for this board, which is sub optimal. Are these 2015 retina files available for buying?

Good news first: battery is charging! OK PPVOUT_S0_LCDBKLT is 15.86V, should be 55V, shouldn't it?

Right, I meant no backlight. I made a stupid mistake! While putting the board back in the case, I did not see the camera cable and it got underneath it so something is shorted :(

Getting there!... I replaced ISL Q7130 and Q7155, put it together, connected battery and now I'm getting a steady green light turning into orange within seconds! But, Mac does not power on. PPBUS is 12.96V. Without battery, PPBUS is 12.50V, I'm getting a chime but no image.

PPBUS with charger only 17.72V, with both fluctuating between 16.35 and 12.12V. 3v42 is reading 3.39V and steady while flashing green light. Is it OK to keep the shunt resistor from late 2013 Retina, although slightly different resistance?

Shunt resistor was out of specs and I used one from a late 13 retina. Now resistance 17/18 is 2.7Ohm but I still get a flashing green light...

Resistance 17/18 is 22 something MegaOhms! Checked R7151 and R7152, both read OK. The wire I run from pin 2 of R7151 to a probe point near R7150 is clean. Tried new ISLs and a used one from a doner board. Same ridiculous high reading on 17/18. What am I doing wrong?

OK the wire I run from R7151 (not R7150...) shorted with nearby C7100 and that's what destroyed green light. Now I put a new ISL, run a new wire but now I get a green light flashing on and off every 1.5 second if battery is connected, and steady green light if battery not connected. What could...

Hello Duke, Disconnected keyboard, did PRAM reset with external kb, GPU Vcore on L8930 is 0,895V...

Thank you JohnB8812, you were right. R7150 pin 2 was blown so I replaced the resistor and run a wire from pin 2 to a probe point near R7150. Nothing changed... So I decided to replace the ISL. Replacement ISL orientation and joints OK, as I put the board in the case and connected the battery...

Hello, I got this logic board 820-4924-A. Minor water damage here and there, nothing crucial as it was working but not recognizing SSD. I ultrasoniced the board and the SSD and it works! Only issue, the battery is recognized but not charging. The battery itself is quite new, 11 load cycles so...

USB mouse is lighting up. No history, thought... other than no water damage.

No water damage, but no history available... Should I ultrasonic it and give it another go before I throw it away?

U7000, resistance on pins 17/18 and 27/28 is 4.5Ohm and 20.9Ohm respectively.

Hello, I got this logic board 820-2879. No signs of water damage. I get a green light. When shorting power pads I get a quarter fan spin and PPVCORE_S0_CPU pulses for a blink at about 0.9V. PPBUS_G3H is 12.56V. What should I measure next?

I did reset PRAM, no luck.Is PPVCORE_S0_CPU at 0.825V OK?

Hello, I got this logic board 820-3332, got a green light, both fans spin, no chime. I retouched the joints of U8900, nothing changed. PPVCORE_S0_CPU is 0.825V ALL_SYS_PWRGD is 3.3V PPVCORE_GPU is 0,896V Anything else to measure? Any ideas?

Hello, I got this logic board 820-2850, replaced C9560 just to be sure, it passed EFI and OS ASD tests successfully. I installed a fresh High Sierra on an SSD and it takes 65 seconds to boot. When running, it does not appear slow, however I get no sound. Icon in the top bar is greyed out. In...

Thank you for your help.