The backup battery does take a fair amount of time sitting on the supply before it's charged up. And you should consistently be doing a cold start not just reset while getting the backup system going (so ram is in a clean state to begin with)
You may well be having other issues but I recommend being consistent to rule out the usual issue which is backup battery fully charged and a proper cold start. On Sun, Sep 29, 2024, 1:48 PM Andy <[email protected]> wrote: > With the memory power off, it reads 3.7v, with it on, the voltage declines > to about 2.6, albeit a little more slowly. I assume this is because it is > feeding RAM rather than anything. > > The old battery, out of the unit, reads 3.55 volts. > > The only way I seem able to get the 102 booted up right now is with the AC > adapter. Even then, it takes a few power on/off cycles, sometimes with > reset pressed, and usually comes up with just a partial home screen first. > On a new set of batteries, it doesn’t seem to get even that far - just the > all-on blank screen. > > The old battery showed no sign of leakage or corrosion on the board, but > what I assume to be part of the motherboard dealing with power (below the > battery compartment) did have a lot of corrosion on both sides of the > board. Unfortunately, I don’t have equipment or skills to know how to test > anything there! > > Andy > > > > > Date: Sat, 28 Sep 2024 18:15:43 -0400 > > From: Josh Malone <[email protected]> > > To: [email protected] > > Cc: [email protected] > > Subject: Re: [M100] 102 with power-up issues > > Message-ID: > > <CAB==woO9b6kKMEVfa4hCqW_AHcUDKXt_LJj= > [email protected]> > > Content-Type: text/plain; charset="utf-8" > > > > What voltage do you read on the memory power test point with the new > > battery? > >
