I gave a talk on Tandy 100 repairs at the last Tandy Assembly show. My slides are available here:
https://www.vintageboot.net/2019/09/tandy-assembly-talk-m100-repairs/ The battery leakage has likely caused all manner of problems for the logic board on the 100, so you'll need to address this machine in steps. I do *not* recommend soaking PCBs in any liquid for any amount of time, but you can use vinegar or (even better) citric acid to neutralize the alkaline leakage. Then, remove the memory battery (no need to install a new one just yet). Then inspect traces and components for corrosion and further damage. Then replace the electrolytic capacitors. In the event that the system appears seriously damaged, several folks on the list (incl. myself) offer repair services. Repair of a battery-damaged M100 is very often NOT a trivial task and I don't recommend it for beginners at this point. -Josh On Tue, Feb 9, 2021 at 3:26 PM AvantGuard Systems <[email protected]> wrote: > > Just joined the list as I just acquired a used TRS80 Model 100. Of course > it's not working, so I just wanted to first ask for some advice. I have been > reading info at Club100. > Basically, I feel I need to buy some stuff at Club100. First and foremost a > new battery, which is highly recommended. Also expansion RAM (since none has > been installed), probably the power supply (although maybe premature). But > probably better cost wise to get everything right away (shipping costs!). > Anyhow, opening it up though I see that this thing obviously had batteries > left in it and there is dry acid (whatever that is) about that general area > on the board. My concern is that that might be enough damage that there's no > way to recover it. Or maybe cleaning that area up might be fine. What is > recommended for cleaning up battery acid, btw. > Thanks for any suggestions! > > Curtis
