"Dani" wrote in message
ups.com...
Model # AVR-10, has raw B+ plus & minus, @ turn on, but display is
totally black, & unit is
otherwise dead. Outputs all check fine, nothing shorted, or open,
there isn't a relay, or control
transformer. Anyone see this problem? dani.


There is a service bulletin for this symptom - though I'm a bit skeptical
after reading it. There is an LC7821 input select IC near the right rear
corner of the main pcb which they say causes this problem. Maybe it loads
down a regulated power supply line.
I can send you the manual and service bulletin in PDF form. You'll need Win
RAR to reassemble the service manual chunks.

Mark Z.