Hp9133 hardware problem

[jebem]

(03-28-2016 02:12 PM)Maximilian Hohmann Wrote:  The video/screen of the computer does not work and the disk drive displays the "Fault" LED.

The picture shows that the CRT HV is ok, but the cathode voltages are wrong or the driving signals are absent.
Either way, the first thing to check is the power supply voltages for the correct values (within 5%).

EDIT:
1. Please make sure you have someone qualified to handle this kind of equipment that operates with CRT HV (High Voltage) inside!!!

2. According to the service manual, the power supply voltages to check that I referred above, are:
+5VDC
+12VDC
-12VDC