Puevig reven
New member
I have a 820-2879 with no water damage, has a green light but does not power on. All S5 power rails are present, but all S3 and S0 rails are missing. PM_SLP_S4_L is missing too and I believe this is what is responsible for enabling the S3 rails? Does U1400 create PM_SLP_S4_L on this machine or is this the SMC?? I am extremely confused-any help would be great.