I agree with Josh, the memory backup battery is a good place to start. It not only powers the RAM but also 3-4 other chips which control the reset power on/off process.
I have never found the Model 200 caps to need replacing as general practice. Jeff Birt From: M100 <[email protected]> On Behalf Of Josh Malone Sent: Friday, July 5, 2024 2:49 PM To: [email protected] Subject: Re: [M100] Model 200 power issue I seem to recall seeing this symptom (basically, a failure to turn off properly) when there were issues with the memory power battery or the 5v power rail itself. Has the memory battery been replaced on this unit? -Josh On Fri, Jul 5, 2024 at 3:47 PM A Guy <[email protected] <mailto:[email protected]> > wrote: Hello everyone! Long time lurker. I finally got a Tandy 200 (bday present :)). It is in really great condition and powers on and seems to work fine. HOWEVER, when you hit the power button it "turns off" but leaves two single pixel tall lines across the display. The position changes each time. And you can hear a faint rapid clicking noise coming from the unit. And it takes several presses of the power button to get it to turn back on correctly. Any idea what the issue is? Is this just an old cap problem and I need to recap it? I wanted to get some input before I dove into it. Thanks! Josh Carlson
