820-3437 - Does RTC reset over and over.

gcain

New member
Had liquid damage on C1910, which I replaced.

Could this be a faulty U1900?

It looks like an RTC reset that repeats ad nauseam.
 

2informaticos

Administrator
Staff member
Do you get variations at pin1?
It must be always high.
Remove U1900 and clean all that area and its pads; then resolder it.
Pin12 has stable clock?
 

gcain

New member
Just noticed that PP3v3_S5 is power cycling.
Didn't pick up on it the first time I looked.
 

gcain

New member
PPBus is stable.

It seems to be boot every now and then, but mostly power cycles.
Will check G2_EN and S5_pwrgd in a moment.
 

gcain

New member
S5_pwrgd is stable.

Ugh, G2_EN is cycling. But every five or ten powers I can get it stable, then it boots fine.
 
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