G-squared wrote:
On Feb 3, 7:07 pm, "Jerry G." wrote:
I would try to troubleshoot the set to find the components that
have
become thermo sensitive, and change them. Then I would put in a fan
if I
thought the set was running too hot.

If you have some thermo sensitive components in the TV set, with
time
they will keep degrading until they fail. At this point, the
problem may
be more serious.

--

Jerry G.

wrote in message

FWIW, we have a Samsung SIR-T165 ATSC tuner to go with the HD ready
50" DLP. The tuner was getting flaky when it got warmed up and would
begin stuttering. I found a rather warm IC (80 + pin Quad Flat Pack)
that seemed to operate better when cooler. I added a low speed fan (12
volt unit running on 7) 3 years ago and it's working fine. The tuner
has a VERY convenient way to do this as it has a 4 pin connector
identical (including pinout) to an IDE hard drive. I snagged a mating
connector from a junk PC power supply and connected the fan between
the +12 and +5. A little hot glue anchored the fan to the case.

Some faults are easier to 'band-aid' than to actually repair. I don't
know if is bad solder outside the chip or a potential fault inside it
but it has run over 6000 hours 'broken'.

I also have an old Sony digital audio processor that was inproperly
heat sinked on a regulator chip. It's not very common but not unheard
of to ship marginal design units.

SO, if the fan makes it work, enjoy it and don't lose sleep over it.

GG
It's one thing to 'fix' by proper heat control when something is flaky
'out of the box' so to speak. It's a little different when the problem
is caused by heat over a period of time. Then things go bad, and
replacement is often the only option.

I have a DVD recorder with a known heat problem. Finally the marginal
filter caps died and the machine just 'freaked out'. I did serious
thermal improvements, replaced the filters and got the ps working. I
haven't dx'd it yet, but although most symptoms disappeared, it's still
not 'right'.

I found a novel way to add a fan to that one: the molex connector from
the ps had spacing which was perfect for the fan connector (from a cpu
heatsink). I cut two small pieces of wire from a paperclip and forced
them into the top of the connector on the 12v line. Thus I was able to
plug the fan in a sort of 'piggy back' fashion, without soldering or
splicing any lines...nice, clean, secure connection.

jak