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Sick Symbolics monitor
Date: Fri, 9 Apr 93 23:15:29 -0700
From: firstname.lastname@example.org (Chris Russell)
I have a sick Symbolics monitor, model 3670. When I turn it on, I get
a little noise on the speaker and the LEDs inside the monitor read "FF0".
I don't get anything on the monitor.
Does anyone know how to read these LEDs?
They're only useful when you put the monitor into diagnostic mode (there's
a toggle switch on the controller board); they can be used to debug the
firmware. This is not something anyone should need to do these days.
I'm going from memory, but I think FF0 is a normal value. Your problem is
probably the high-voltage power supply (it powers the tube, but not the
electronics) or the tube itself. In either case, there's not much you can
do but replace the failing component.