Sounds like some bad
capacitors, probably on the power board. I've had a similar problem
with a Dell 17" monitor, a 42" plasma tv and a 37" LED
LCD tv, all now fixed and working properly.
If it's
under warranty then send it back to be fixed. If not then you have
two options.
1. Pay a tv repairman or similar to fix it for
you. Probably the most expensive option.
2. You could
remove/replace them yourself if you're handy with electronics, or
know someone who is. All you need is a soldering iron and a
screwdriver. The capacitors themselves are quite cheap and easy
to replace
They should look something like this:
As
you should be able to see, the one on the left is bulging. The blue
stripe with the arrow tells you that the lead on that side is the
negative, the positive lead should also be longer than the negative
one.
Tools needed
-----------------
1. Soldering
iron.
2. Solder - not acid core
3. Phillips screwdriver
4.
Flat head screwdriver
5.
Wirecutters
Instructions
--------------
1. Unplug
monitor and open case.
2. Identify power board, it should have
a lot of electrolytic caps on there and obviously should be connected
to where the power lead is attached.
3. Identify the bad caps,
they should be bulging and/or leaking, although not always. Note down
the three values for each cap (eg 220uf, 16v, 105c) and their
approximate dimensions, and get new ones, preferably Rubicon or
Panasonic, the link below will help you chose some good ones. If in
doubt you could remove them and take them to the shop, but you'll
have to remember where each one goes and which way round it was (take
a pic).
4. Very carefully heat up the contacts on one side
with the soldering iron, and rock the cap the other way, then do the
other side, keep doing this until the cap comes out.
4.
Replace with new cap, making sure that you observe the polarity and
make sure it's securely seated and soldered in. Make sure the solder
is neat, tidy and doesn't contact anything else. If there's any
solder left in the holes then you'll have to heat it up or remove it
before you can get the new cap's leads through. Once done properly
trim the leads off so they won't cause any problems.
5.
Replace casing and test. If it doesn't work then you'll have been a
bit messy with the solder, tidy it up and try it again.
Here's
some links to help you:
Bad caps faq - should have pretty much
everything you need to
know.
http://www.badcaps.net/forum/showthread.php?t=425
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