On Tue, Feb 16, 2021 at 12:33 PM AvantGuard Systems <[email protected]> wrote: > > Status of my M100 repair: > > So, I've replaced all the capacitors and put Birt's supercapacitor in place > of the battery.
I would *strongly* recommend having nothing connected on the memory battery pads until you can verify life on the machine. There are too many variables there. With nothing connected, you should see the Vb rail float up to the main power supply rail. > Now it's charging. I think Birt had to charge like 5 hours so we'll see later > today whether the repairs were good enough or not. > I think not.... > > Even after charging for 2 hours there is no sign of life when I turn it on. > Or try Reset or Ctrl+Break+Reset or any combo thereof. But then maybe until > the supercap is fully charged it wouldn't work anyhow. I'd advise you to (once you've disconnected the capacitor) to work through the troubleshooting flowchart in the M100 service manual. https://archive.org/details/TandyM100ServiceManual
