Magitronic P773 Monitor Problems

[Gary]

We recently acquired two Magitronic Magic 7, model P773 monitors with the
same troubles. They both give the start up noise when you power them on, you
get screen voltage for a couple of seconds, the power LED turns from yellow
to green, then the entire process starts over again. The display never
lights up. I could try the HOT but......

Any ideas? I've heard they have poor flybacks.

FCC ID: GKRM773


Thanks!

 

[John Gill]

Gary:
That model number sounds a lot like a Proview. They are known for
the failure of the IRF634 FET on the rear heatsink. There is also
a 22Uf/250V capacitor that usually goes (it expands thrugh the top)
bad and causes the FET to short. Sometimes a diode in the circuit
fails. They are used to regulate the voltage going to the flyback.
Hope this helps...
John