38E: dot in upper left corner of display

[burkhard]

I have a really nice looking 34C with the same problem. Even with freshly-charged batteries which run my other Spice models fine, this one keeps the low battery light on. In my case, I suspect the problem is how it was treated by the guy I bought it from: He "checked it out" by powering it by jumpering a 9V battery up to the battery contacts. Why would someone think 9V is close to 2.4V? Ugh.

Anyhow, it did not blow the ACT chip, because otherwise it works fine, but it does have that low battery light stuck on. If someone understands how the voltage sense circuit, that is probably the place to scour around. With a lot of other projects on the plate, it has been low on my list of priorities. Perhaps we have the same issue?