I assume it's an RCA CTC 169 chassis? You need to post the model, &
chassis numbers. But, you need to check from hot chassis, the voltage
on pin # 15, & 16 of the TEA2261 regulator IC, it should be about 12.
75 volts. Also check diode CR4118, it supplies 13.5 volt standby, &
will measure ok, but produce no voltage.
Replace the capacitors around the TEA 2261 IC. CTC 169 kit. If it's a
rear projection T.V., get a PTV 169 kit, also unhook the input high
voltage wire to the tripler, to see if it's pulling the set down, if
the above repairs aren't needed. Hope this helps, Dani.