Trying to resurrect an LS 6500. Got the elevator working and fixed a printer problem. Now I'm getting H# Count rate too low error when counting. If I switch to just plain cpm I get a count rate of zero. Suspect power supply, but everything else seems to work. Is there a separate HV supply for the PMTs? Any way to test that? I've got lots of instrument troubleshooting/repair experience, just no schematics or service manual make it tough to proceed.
SN is 7067355. It's got the Wyse thin client. Reply to marchem RE: Beckman Coulter - LS 6500