> From: Bob
>
> Hi there. I just got a Chroma Polaris on Ebay, and it isn't working
> right. When you turn it on many of the led's light up, but the same
> ones don't come on every time the switch is turned on and off again.
> Sometimes the same ones will come on a few times in a row but then if
> you leave it off for a couple of minuites a different combination of
> lights will come on. The keyboard makes no sound whatever, and pushing
> any of the buttons will not turn on or off any of the leds. The
> keyboard appears to be in great condition, and the membrane switches
> don't look worn at all. I'm pretty puzzled as to what could be going
> on, or what to do about it. You would think even if the membrane
> switches were shot, the keyboard would at least turn on with one patch
> loaded. Anyone else had a similar problem? Thanx for any help you may
> have. -Bob
The computer simply isn't running. There are lots of things that could cause
this, but at the very least you should open it up and reseat all connectors.
I'd suggest pulling and reseating the CPU and the EPROMs, too, just to clean
their contacts. It's even possible that the EPROMs themselves have faded,
and need to be reburned or replaced. And there could be other hardware
failures, too.
--
Ciao, Paul D. DeRocco
Paul mailto:
pderocco@ix. netcom.com