820-01598 dead pp5v

yair37

Member
fan speed for 2 second then stop and start again and do not stop, no keyboard activity
there was damage at L8504 ( PP5V_G3S_ALSCAM-PP5V_G3S_CPUREG_MISC)near screen connector and whiteout screen SHOW 0.2V
 

2informaticos

Administrator
Staff member
The problem could be caused by some short inside video cable.
Disconnect J8500 and check for USB activity and external video.
 

yair37

Member
o.k i was find that the PP5V_G3S_CPUREG_MISC line was cut so i make jumper and i have 5.3v now, but still just fan spin and cpu is cold, there is usb activity, no screen also no charging sound and no video with external screen.
 

yair37

Member
PPBUS_G3H = 12.63V
PP3v3_G3H = 3.4V
PP1V8_SLPS2R = 1.8V
PP1V8_AWAKE = 1.8V
PP1V1_SLPS2R = 1.1V
PP0V8_SLPS2R = 0.79V
PP3V3_AWAKE = 3.4V
PP1V2_AWAKE = 1.19V
PMU_PVDDMAIN_EN = 3.3V
P3V3MAIN_PGOOD = 3.26V
PP3V_G3H_RTC = 3.0V
PCH_RTC_RESET_L = 3.0V
P5VG3S_EN = 1.8 V
PP5V_G3S = 5.4V

L9080- PP2V5_NAND_SSD0 short!
 

yair37

Member
sorry my mistake!! no short on PP2V5_NAND_SSD0
L9080 both sides, dido mode to ground 350
L9030 PPVCCQ_ANI_SSD0 412 - PVCCQ_LX0 nothing.
L9020 PP0V9_SSD0 430 - PVDD_LX1 nothing
 

2informaticos

Administrator
Staff member
"there is usb activity"
Did you see flashing Link LED on USB device???

Check if machine is detected in DFU mode.
 

2informaticos

Administrator
Staff member
"Yes the is light on the adapter they I connect."
Light on means steady light?
The activity can be checked with Link LED, which MUST flash; read "How To colecction" thread.

Is now detected in DFU?
Try the board disconnecting keyboard/trackpad.
 

2informaticos

Administrator
Staff member
I was talking about audio BOARD and audio FLEX, apart of audio connector.
Leakage from PPBUS_G3H to T2 data lines mostly occurs on these components.

Remove audio board and inspect both sides for corrosion.
 
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