Dell Latitude E5550 LA-A911P rev 1 No Power

[orion78fr]

Hi,

I have dell laptop Latitude E5550 LA-A911P that suddenly has no power.

I haven't found any short on the board (but haven't verified everything so feel free to ask), nothing is getting hot under thermal cam.

+5V_ALW is present
+3.3V_ALW is present
+3.3V_ALW_PCH is absent
+3.3V_RTC_LDO is present
+3.3V_M is absent
+1.05V_M is absent

A_ON & PCH_ALW_ON are low on UE2 pins.

PJP15 is 3.3V
+3.3V_ALW_UE2 is 3.3V

PCH_ALW_ON should be on no matter what when UE2 is powered right ? Does this mean UE2 is bad or can it come from another thing like bios ?

Anyway, here are the two bios files from UC2 & UC3

[mon2]

What is the voltage to ground of +RTC_CELL on UE2 ?

[SMDFlea]

Anyway, here are the two bios files from UC2 & UC3

If you want someone to check your bios please post it in the "Bios requests ONLY!" sub forum.

[orion78fr]

What is the voltage to ground of +RTC_CELL on UE2 ?

+RTC_CELL isn't directly a pin named on UE2 but I think you meant this :

+RTC_CELL on RPE5 is 3.107 V so VC_IN2# on UE2 is 3.085 V
+RTC_CELL_VBAT on UE2 3.119 V (measured leg one of CE11)