HP 9800 - Troubleshooting; Initial Checks

Check
Is the base operating?
(Try
PRINTER IS 0
PRINT
"HELLO")
Is there any display?
Adjust intensity control.
Press control-stop.
Is there a cursor?
Press A76 Test Button.
Does a raster
appear?
Initial Checks
98750 Troubleshooting 4-1
Chapter 4
Troubleshooting
Action
Yes - Proceed with Initial Checks.
No
- Fix base.
Yes - Proceed to Diagnostics.
No
- Proceed with Initial Checks.
Yes -
Proceed to Diagnostics.
No -
Proceed with Initial Checks.
Yes - Fault
in Base.Motherboard.A72
No - Fault
in A73.A74.A75.CRTlYoke