10-25-2009, 07:53 PM
Could be a bad ground or cold solder joint(s) on the circuit board inside the TV.
I had a 27" RCA (way back when) that developed the sudden-off problem within a year of purchase; it was still in warranty, and included one housecall for service. Repair guy popped the case open and resoldered the RF shield box around all the tuner components. Worked fine after that for another 10 years, then started again.
I did the open up and resolder but it was very tricky, since there were multiple stakes from the circuit board to the box top, and the stakes ended exactly at the top (nothing sticking out), so no way to guarantee the solder made a good electrical connection. In time, with heating/cooling cycles, thermal expansion and contraction would cause the solder joints to fail. Thank you, Thomson-CSF SA, for a totally lame implementation (they did the RCA electronics and other brands as well).
Is there a lot of vibration transferred to the set? Does the time-honored pound-on-the-side-until-it-works approach correct the issue, at least temporarily?
I had a 27" RCA (way back when) that developed the sudden-off problem within a year of purchase; it was still in warranty, and included one housecall for service. Repair guy popped the case open and resoldered the RF shield box around all the tuner components. Worked fine after that for another 10 years, then started again.
I did the open up and resolder but it was very tricky, since there were multiple stakes from the circuit board to the box top, and the stakes ended exactly at the top (nothing sticking out), so no way to guarantee the solder made a good electrical connection. In time, with heating/cooling cycles, thermal expansion and contraction would cause the solder joints to fail. Thank you, Thomson-CSF SA, for a totally lame implementation (they did the RCA electronics and other brands as well).
Is there a lot of vibration transferred to the set? Does the time-honored pound-on-the-side-until-it-works approach correct the issue, at least temporarily?