I'm trying to access the Service screen on this v9.0 PTC-100 and I don't know the password.
When I hold down "PAUSE" and power it on, the screen shows "Service screen, Please press CANCEL". Of course, pressing cancel causes it to power up normally. I can press the keypad and it seems to add "+"s to the screen and pressing PROCEED seems to pause the system and the +'s clear.
Any ideas? I've tried the serial number, the equivalent of BIO-RAD. Reply to jwillistein