I'm getting back to my "bete noir", a GPN Sharpshooter after a year because I have some people interested in it and I can't just let it sit there.
I get three of six flashes on power up which indicates a bad 6810 IC. I have replaced the 6810, Z80CPU and a half dozen other chips, still three flashes.
When power on the CPU I found that I have 2.18 VDC on TP5, and only millivolts on TP3. The wretched schematic that comes with this thing really does not show what the readings should be for these TPs.
Looking for ideas as to why I have no voltage at TP3 and if 2.18 at TP5 is correct. Also, any other suggestions as to why I have only three flashes with a good 6810.
Let's hope that we have an exiting game tomorrow.