<html><body><div dir="ltr">Hello,<div><br></div><div dir="ltr">Background:</div><div dir="ltr"><br></div><div dir="ltr">I recently got a Sun 3/50 that seems to boot into the ROM check fine which I can witness via Serial Port A. All attempts to interact via the keyboard fail. I have a Null Modem cable I use with all my Sun Sparc boxes and after using breakouts and other alternate schemes Im quite sure that something in the port A input processing isn’t working. If I fill the keyboard buffer on boot I can occasionally get the test menu to come up so something is getting through once in a while.</div><div dir="ltr"><br></div><div dir="ltr">Request:</div><div dir="ltr"><br></div><div dir="ltr">I’ve had other machines in my collection where the some of 7400 logic got shocked with a static charge and it’s relatively easy to debug and fix if you have the schematics. I can’t seem to find 3/50 schematics out there. If anyone has them It would be super helpful!</div><div dir="ltr"><br></div><div dir="ltr">Thanks!</div><div dir="ltr"><br></div><div dir="ltr">-t <br></div><div><br></div><div><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div style="font-size:medium;margin-top:0px"><div style="margin-top:0px;font-weight:bold"><div style="margin-top:0px"><div style="margin-top:0px"><div style="margin-top:0px"><font style="font-size:14px">Todd Vernon</font></div><div style="font-weight:normal;margin-top:0px"><font style="font-size:13px">Entrepreneur | Investor</font></div><div style="font-weight:400;font-size:13px;margin-top:0px;color:rgb(80,0,80)">Email: <a href="mailto:todd@toddvernon.com" target="_blank">todd@toddvernon.com</a></div><div style="font-weight:400;font-size:13px;margin-top:0px;color:rgb(80,0,80)">LinkedIn: <a href="https://www.linkedin.com/in/toddvernon/" target="_blank">toddvernon</a></div></div></div></div></div></div></div></div></div></div></body></html>