While i was cleaning house I left the Truflat on mute for a couple hours and when i went to unmute it there was no sound. Then the screen started flashing like the signal was being interupted, ya know, flashing blue then going back to normal.... What is the deal??
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Re: Picture but no sound
If it was on a digital channel, check your cable connections again or rabbit ears and re-aim. flashing blue and what not--blue is alternative 'friendly' display instead of STATIC. On a digital channel, instead, you'll just start losing the sound or the picture will pixelize if not go out completely. Try another channel/source.
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The SMPS (switch mode power supply) is a bit tricky in this unit. Failures in the SMPS can give false impressions of what's actually happening with regard to the symptoms.
You'll need to ESR the caps in the SMPS first. C525 250v/10uf is a good place to start. It sounds like the B+ voltages are present by the noise you're describing and that would indicate that the regulator circuit is probably okay. Next I'd check things like the HOT (horizontal output transistor) for short.
NOTE: If you don't have an ESR meter the job is nearly impossible. Electrolytic caps don't always show any outward signs of damage. Only by checking their equivelent series resistance are you able to determine if a lytic is the culprit.
Since the you were vacuuming behind the set before this happened, I'm going to assume that you unplugged an input.
Check the wiring, not just on the back of the set, but, on the back of the peripherals (DVD, Satelite, cable box, etc.)
If wires are connected, then, take a component, such as a VCR or cable box and hook it up to the RF connector (AKA the cable connector) and run it on channel 3 or 4. If you have sound, then, you have a configuration problem and need to rewire your set.
Hope this helps.