Re: 2402a Tekmate troubleshooting


Ryan Scott
 

If there is any interest I have a Tekmate 2402 I can offer for sale $25 plus shipping from 97229.
Thanks, Ryan N7QJ

On Thursday, April 6, 2017 11:45 AM, "szigszabolcs@... [TekScopes]" <TekScopes@...> wrote:


  Hi,

Thanks. I've already read you page, while this was being shipped, lots of valuable info, thank you for that..
Yes, the power seems to be all right, +5, +12, -12 are all there. The ripple is below 100mV, whic, i don't have spec on, but I think should be acceptable.
Since I've already taken it apart, i'll be removing the nvram and adding a bettery to itanyway, that wouldn't hurt. Once that done, I can continue troubleshooting.
I did see activity on the CPU bus with a scope, so something is going on, but there is definitely nothing on the EGA. I plugged in a keyboard, caps lock, num lock leds don't work, so it's not getting far enough to initialize the BIOS keyboard routines.
Also, I'm planning to find an ISA VGA card, and i'll be pulling the BIOS eproms to see if they have their content.
Then we'll see. I'd really like to get it working, just for the fun of it.


Szabolcs



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