Hi have this problem with CRT tv model no: RC-4120PS, powersupply is whining.No high voltage ,no scr. voltage however the power LED comes on with the whining noise.There's also no voltage going to the Horizontal aswell as the vertical yoke.Have traced the whining noise to the high freq transformer not lopt.
The voltage going to the collector of the HOT is correct 135V but drops to 93V when I press the power switch, there's also otputs on two 25v, 470uF ecaps. of 10V each.
I have serviced a few tv's before
You have a short in the horizontal ckt,look for diodes,horizontal output it might be damage or a bad cap, if not the fly-back transformer is gone.
good luck
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when i plug in the tv i get a high pitch whining noise. i'm not a tv repair specialist. is this a diy fix or does it need professional service?
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