Hi,

my Panasonic TXW28R4DP finally gave up the ghost. When first turned on,
the screen would fizz rapidly to black and back, and if it stayed totally
black long enough would shut off the PSU, unless you kept bashing it to give
it some more white before the shutoff circuit timed out. I am guessing the
HT was intermittent.(?) After maybe a minutes bashing it would stay on
indefinately.

I tried in vain to find a dry joint or bad connection but couldn't and I
even ended up soldering all the larger joints on the mainboard but to no
avail. I repair audio equipment for a living and am used to dry
joints/connections going bad and repairing them, but this was so sensitive
to mechanical shock I couldn't home in on it at all.

Now, no amount of bashing will get any white to appear, so the PSU just
shuts off after 3 seconds or so.

What should I do now? Is there a commonish component or joint that causes
this? I don't like TV's, they scare me a lot, even though I repair lots of
valve guitar amps with dangerous voltages inside. Hence I haven't really
gone much near the HT section while the set is on, other than poke around
with a drumstick to no avail.


Thanks in advance for any pointers.


Gareth.