[SOLVED]820-00165 Rails too high, unstable

[G.Beard]

Hi.

No liquid damage.

PPBUS = 9.4V max unstable
PP3V42 = 3V7 Max unstable
S5 Rails also unstable, fluctuate all over the place.


What now?
Cheers.

 

[aprendiz]

Run diagnostic (Hold D key on startup), also check you DMM battery....

 

[G.Beard]

Run diagnostic (Hold D key on startup), also check you DMM battery....

It does not power on. PPBUS fluctuates, S5 rails fluctuate... So no power on

 

[ALB-Repairs]

Id start by looking at PP3v42 regulator/components, I say this because its a standalone regulator without communication to anything else, I think if you sort the high pp3v42 the other rails may drop back down, maybe try and power pp3v42 of a bench supply and everything else of a charger and see if the other rails start behaving normally.

 

[G.Beard]

Id start by looking at PP3v42 regulator/components, I say this because its a standalone regulator without communication to anything else, I think if you sort the high pp3v42 the other rails may drop back down, maybe try and power pp3v42 of a bench supply and everything else of a charger and see if the other rails start behaving normally.

Nope, Fixed!
The high PPBUS is why I posted this thread but it turns out I was using a bad meter. Had me confused for fucking ages!


S5 rails where cycling so there was a short.
Turns out it was on PP5V_S4RS3. Short removed, power on all fine

Thanks for taking the time guys!

Please mark solved.

 

[aprendiz]

So, it was in fact a bad DMM.....lol

 

[dukefawks]

The battery in your meter is low.....