"Jeff Liebermann" wrote in message
...
On Sun, 5 Jun 2011 01:32:21 +0100, "Arfa Daily"
wrote:
On a lot of these LCD TVs, if you leave the cap problem for too long, with
the startup getting slower and slower as the offending caps get worse, it
can result in corrupt EEPROM data, so if the OP has only just started
having
trouble with it, there's a good chance that it's just caps. If he has been
struggling to get it to come on for some weeks, then the fact that it
won't
now come on at all, *might* indicate that the EEPROM has now taken a hit
...
Arfa
Good point. I hadn't thought of it that way. Of what I can remember
from trying to concentrate while the owners 2 year old was in turbo
screaming mode, was that the TV was giving them on/off problems for
about 6 months before finally it quit. The LG 32LX1D was purchased in
about 2007, so it was well out of warranty. Same symptoms as the OP.
When I opened it up, the bulging caps in the power supply were
obvious. I replaced two that were bulging, and three more that failed
with the ESR meter. I didn't do anything with the other boards.
I've only fixed one LG that required reloading the firmware. I don't
recall the model number. The TV just would not turn on after a power
glitch. Prior to that, it operated normally. The customer (an
engineer) then attempted to reflash the firmware using the wrong
firmware, which bricked the TV. I found the correct firmware, and
flashed it, which fixed it.
The proposed symptom analysis was my guesswork, which by your
comments, it's going to work.
Note: I don't fix many LCD TV's. Maybe 3 per year. I fix many more
LCD monitors (which are much much much easier).
--
Jeff Liebermann
I try to avoid TVs as much as I can, as well. The ones that friends and
their friends have that they insist on bringing to me, are invariably over
42" and have the type of construction where 496 screws have to come out to
get inside, as well as the stand having to come off so that it won't stay
upright on the bench. A shop that I do a lot of audio work for, specialises
in them. He has a dedicated bench, and a sort of padded 'cradle' made from
copper plumbing fittings and tube, that a stand-less LCD or plasma TV will
happily sit on for servicing.
Arfa