Thanks Kurt --- the machine is absolutely non-responsive (basic,enter,beep,enter does nothing), so I suspect removing the battery might be a better first step, rather than immediately breaking the probe out....
Does anybody have measurements on what the case screws dimensions are (length, thread size, pitch)? All 3 of the 200s were missing case screws, which I'd eventually like to remediate. On Tue, Nov 13, 2018 at 4:03 PM Kurt McCullum <[email protected]> wrote: > > I ran my 200 without a NiCD for about a year. It worked fine. I did > finally put a new NiCD into it this summer. I saw a similar error when I > tried to put a super capacitor in place of the NiCD. But this gave me the > horizontal line error. Removing it fixed my problem. I'm not sure if yours > is the same but thought I'd mention it. > > Kurt > > On Tue, Nov 13, 2018, at 12:59 PM, Britt Dodd wrote: > > Good afternoon, > > Until this past weekend, I've never given serious thought about the TRS-80 > project I have on my project list, but after attending the Tandy Assembly, > I am now the proud owner of 1 Model 100, 3 Model 200 project machines and a > CoCo 2! I'm trying to get the 200s up and running...they boot to a screen > with lines, I've taken one of them apart, and cleaned up the ribbon > connector with Deoxit, which didn't seem to help. It almost seems like the > panel is "on" but not initializing properly, so I did the cold boot and the > "arctic boot" procedures, to no avail. > > Something caught my eye on a VCF forum post, where someone had mentioned > that if the NiCD battery isn't fully charged, the machine's RAM could be > 'somewhat preserved' in an unconsistant state and recommended removal, and > that the NiCD battery's presence was only intended to persist RAM contents > long enough to change batteries. Is that true (NiCD battery isn't needed)? > And as a follow-up, although capacitors "appear" okay, would a re-cap be > needed for this? Traditionally (i'm a Macintosh/Amiga collector -- until > now), recapping was mostly needed for SMD components, and through-hole > passives typically are considered reliable, is this true here too? If NiCD > battery isn't needed, I plan on snipping them from the 200s and the 100 I > have too, since I could easily just offload (via serial) to a PC or > something. > > > > Thank you, > Britt > > >
