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Default Magavox PTV705 blows HOT instantly

Hi. Magnavox PTV705, blows Q802 HOT instantly. Have checked, good H drive to
base from proc chip, with HOT removed and HV cable detached to avoid crt
problems. Anyway, done up with HOT removed and HV isolated, I can fire up
for 1 second. During this time I have good base signal to HOT base
connector. If I put in new transistor, makes a not pretty noise, then is
instantly shorted. Have found no obvious bad parts near the area. Any ideas?

Thanks in advance,

Danny