I'm working on 820-00165 board, which came to me with description: "Turned off by itself, after a while turned on, but SSD wasn't detected. Now has no reaction for charger".
My observations:
- board is clean, no corrosion, no water damage, no mechanical damage.
- there is no green light when charger plugged in
- I have discovered, that PP3V42_G3H is missing and has low reading - 0,007V to ground in diode mode. After further inspection I found out, that short is caused by SMC itself. I have removed SMC and replaced it with one from the same board. PP3V42_G3H is back now, I have green then orange light on charger, but no fan spin.
Other measurements:
- PPBUS_G3H - 8,57V
- PP3V42_G3H - 3,42V
- PP3V3_S5 - 3,35V
- PP5V_S5 - 5,12V
- PPVRTC_G3H - 3,31V
- PP5V_S4RS3 - 0V (0,390V to ground)
- PP3V3_SUS - 0V (0,390V to ground)
-PP3V3_SUS_EN - 0V (0,495V to ground)
- PM_SLP_SUS_L - 0V (not pulsing)
- PM_SLP_S4_L - 0V (not pulsing)
I already have tried another SMC from 820-00165 board, but it behaves the same.
My observations:
- board is clean, no corrosion, no water damage, no mechanical damage.
- there is no green light when charger plugged in
- I have discovered, that PP3V42_G3H is missing and has low reading - 0,007V to ground in diode mode. After further inspection I found out, that short is caused by SMC itself. I have removed SMC and replaced it with one from the same board. PP3V42_G3H is back now, I have green then orange light on charger, but no fan spin.
Other measurements:
- PPBUS_G3H - 8,57V
- PP3V42_G3H - 3,42V
- PP3V3_S5 - 3,35V
- PP5V_S5 - 5,12V
- PPVRTC_G3H - 3,31V
- PP5V_S4RS3 - 0V (0,390V to ground)
- PP3V3_SUS - 0V (0,390V to ground)
-PP3V3_SUS_EN - 0V (0,495V to ground)
- PM_SLP_SUS_L - 0V (not pulsing)
- PM_SLP_S4_L - 0V (not pulsing)
I already have tried another SMC from 820-00165 board, but it behaves the same.