In honor of the late great George Romero, I'm now going to re-animate this thread from three months ago. :-)
I finally got around to ordering a new backup battery, which I installed last night. First of all, it had very clearly been replaced before (I'm the second owner of my 100; got it quite a ways back from a professor who was cleaning out his office) and whoever did it had extremely questionable soldering skills. Matter of fact it almost looked like they used a butane torch or something from the scorch marks on the board. One of the pads was missing as well; I had to build it back up with solder before I could get started. But anyways, got the old battery out and the new one in and everything reassembled. I put the batteries back in and left it off overnight (with the memory switch on). I tried it this morning and I'm exactly where I was before. The LED blinks when I switch it on, and I can use the contrast knob to make the screen all light or all dark. But there's nothing on it. The 'beep test' of hitting enter, 'beep', enter doesn't do anything either. Any ideas as to next steps? I brought it with me to the office this morning and figured I'd put four new batteries in. I ordered a wall charger which I'm expecting Friday; I don't know if letting it charge via that would make any difference or not. I did a quick visual inspection of the board while I had it apart last night and everything seems to be seated OK. The LCD is relatively new; I bought it from Rick not too long before he passed away. And you can see that all the pixels are good when you turn the contrast up. Plus the fact that it doesn't beep when you blindly drop it in to BASIC... it's as though there's just nothing going on behind the scenes. On Mon, May 1, 2017 at 9:28 AM, Roger Mullins <km4...@gmail.com> wrote: > Thanks, Ken! My bad, I should have mentioned I did that too. No beep. > So I guess I'm in battery replacement territory for my next step. Oh > well... the original one had a good 34-ish year run. > > > > > Roger, > > Try: > > - Power on > - Enter (goes into BASIC) > - Type: BEEP > - Hit Enter > - Listen if you hear a beep > > This will tell you if the processor is running or if it is just an LCD > issue. If no beep heard, maybe needs a new NiCD battery or a good > overnight charge. Otherwise might be an LCD issue. > > Ken > >
