MacBook Air with diode burnt


New member
Good morning everyone, I've been dealing with a MacBook Air 820-01521 for two days that suddenly stopped working. After much research I found damaged D3321 and D3320. I replaced them but the computer won't turn on. I have 5V on PP20V_USBC and the CPU at 0.90V stable. But no sign of life.


Staff member
Then which CPU coil get 0.9V?

BTW, write directly into bottom reply box, instead of clicking Reply button.
I don't see any reason to quote an entire post, visible few centimeters above; thanks.


New member
I checked again, the line was PP0V9_SLPDDR at present I get a slight heating of the motherboard if left connected for more than 1 minute