Good news - it was just the switch. Cleaned it out a bit then worked it back and forth till it sounded snappy, and it's all good to go. Thanks for everyone's suggestions.<br><br>Now I've got a 16k ram upgrade (to take it up to 64k) and a serial I/O board to install. The serial I/O is more important, I'll probably tackle that first. I'm sure I'll be back to bug the list again!
<br><br><div><span class="gmail_quote">On 3/20/07, <b class="gmail_sendername">Peter Shkabara</b> <<a href="mailto:peter59@sbcglobal.net">peter59@sbcglobal.net</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<div dir="ltr" align="left"><span><font color="#0000ff" size="2">Hi Mike,</font></span></div>
<div dir="ltr" align="left"><span></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2">As has already been suggested, check the power switch. Actually, any such
troubleshooting would involve checking for power starting from the power cord.
Also, a common failure mode on the H89 was the Molex connectors. You may want to
disconnect and clean each of them just for preventative maintenance. Good
luck.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2"></font></span> </div>
<div dir="ltr" align="left"><span>
<div align="left"><font face="Arial" size="2">Peter</font></div>
<div align="left"><font face="Arial" size="2">----------------------------------</font></div>
<div align="left"><font face="Arial" size="2"><a href="mailto:peter59@sbcglobal.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">peter59@sbcglobal.net</a></font></div></span></div><br>
<div dir="ltr" align="left" lang="en-us">
<hr><span class="q">
A brief introduction - I'm probably a little younger than most of the group, but
I started my career as a programmer (at 4 years old in BASIC) on the H89 that my
father assembled. I grew up reading REMark and Sextant and helped to build and
upgrade an H-150 along the way. <br><br>Well, I recently took possession of the
H89, did a quick interior dusting and exterior cleaning, and attempted to power
it on. But, powering it on does nothing. No fan, no clicks, no smoke, nothing at
all. The fuse is fine. I did a quick visual inspection of the power supply
(without removing anything) but didn't see anything amiss, and there's no scent
of smoke. I was the last one to use the machine, but I don't remember having any
problems with it. (Although, that was 15-20 years ago, memory isn't perfect)
<br><br></span>Mike Shields<br></div></div>
</blockquote></div><br>