Model 2000 now boots, but video problems

[kb2syd]

I've been working on getting one running now for quite a while. Finally have a model 2000, VM-1, and 10 meg HD booting. Still need to fix a video problem (probably a bad RAM chip), but that only affects certain video modes.

Once I got it running, I found that the hard drive has WordPerfect 4.2 and Open Access on it.

Does anyone have the service manual for this machine laying around? The problem with the video mode is hard to describe, but here goes:

When entering any of the extended video modes, the screen appears 4 times on the screen kind of like a HollyWood Squares effect. None of the images are clear, and a mode co40 followed by mode co80 clears it up.

[dreddnott]

Does it kind of look like a sync/refresh rate problem does on other monitors? Is the image flickery/interlaced-looking?

[Terry Yager]

I've seen that 4-screens-in-one thinggy before, but I don't recall what causes it, other than incorrect synch rate. Are you using a bona-fide T2K monitor?

--T

[MystikShadows]

here's a couple links that might help you out.

http://www.geocities.com/siliconvalley/lakes/6757/T2000.HTML

http://www.geocities.com/siliconvalley/lakes/6757/t2kfaq.txt

not sure if it's exactly hardware manuals but I Hope this helps

[kb2syd]

Yep, using the genuine CM-1 color monitor for the Model 2000. The resulting image is dead solid (not flickering at all). However, it is not intact. I'll try to take a picture of it.

It does look like what Terry is describing, but not flickery (is that a word?) like an improper sync rate. I'm going to try to work on the memory problem first (only detects 256k out of 640), then move on to the video problem.