EsteTron
Member
820-4924 came in with no signs of liquid damage and no power on and no mag light. I left the board alone for 2 days while I worked on other repairs, and by the time I got to the board, I first plugged in magsafe and got a orange light. Light disappeared after a few seconds. I then removed magsafe and battery and held power button down for 10 seconds, reconnected power and got orange light and was able to boot machine to login screen. I decided to leave machine alone to charge up battery and noticed mage safe disappeared after a few minutes.
Now device has orange light, and no boot. First thing I checked was All_SYS_PWRGD and noticed it was not present.
PP3v42= 3.42v
PPBUS = 12.6v
PPVRTC_G3= 3.V
PPVIN_S5= 12
PP5V_S5 = 5V
PP5V_S4 = 0
PP3V3_S5= 3.3V
PP3V3_S4= 0
It appears my PM_SLP_S5_L is not present so S4, S3, S0 rails are not present. Checked up the line and found PM_SLP_S5_L is created by U0500, so I looked into PM_PCH_PWROK and noticed it wasn't present either. I then noticed that PM_PCH_PWROK is created by the U1950 Logic Gate, which is enabled once ALL_SYS_PWRGD is present.
I feel like I just went in a giant circle and was hoping for any advice on what I should be looking at next.
Thank you in advance.
Now device has orange light, and no boot. First thing I checked was All_SYS_PWRGD and noticed it was not present.
PP3v42= 3.42v
PPBUS = 12.6v
PPVRTC_G3= 3.V
PPVIN_S5= 12
PP5V_S5 = 5V
PP5V_S4 = 0
PP3V3_S5= 3.3V
PP3V3_S4= 0
It appears my PM_SLP_S5_L is not present so S4, S3, S0 rails are not present. Checked up the line and found PM_SLP_S5_L is created by U0500, so I looked into PM_PCH_PWROK and noticed it wasn't present either. I then noticed that PM_PCH_PWROK is created by the U1950 Logic Gate, which is enabled once ALL_SYS_PWRGD is present.
I feel like I just went in a giant circle and was hoping for any advice on what I should be looking at next.
Thank you in advance.