I replaced the switching regulator already, and 2 other transistors
that were suspect in the power supply. All with Hitachi replacements. I
wasn't getting steady voltage readings, they were cycling slightly
above to almost zero compared to the schematic. I'm not sure though how
to check Q702 which I think is an SCR (part of protective circuit). I
have read that someone with similiar symptom replaced a leaky one that
repaired the set. There are also 2 IC's - 902, 903, protective and
regulator respectively. Both are exact same circuit wise, but don't
check the same with diode/ohm check. Thanks for the info, any other
ideas?