I found this bit helpful (look at my comments at end):
My Mitsubishi WS-55613 (55" rear-projection HDTV) died Saturday, just
when I tried to turn on the UNC/Kentucky game. It was exhibiting what
I'd seen described before (found at another online HDTV forum) as what
appears to be a very frequent problem that occurs in Mitsubishi
rear-projection widescreen HDTV's, referred to as "The Blinking Green
light of Death". This refers to the green LED on the front panel of the
TV that normally blinks when turned on after a power failure or when
unplugged: the green light is supposed to flash for about 1 minute
while both microprocessors boot up: If it won't stop blinking it means
that they aren't communicating w/each other,
and you ain't got no TV to watch...
About a year ago, I'd noticed and saved an article describing this
issue, along with a repair procedure to replace the four (apparently
inadequate) 1000uF/16 volt power supply capacitors in the "DM module"
(one of the two onboard microprocessors). These capacitors are
apparently undersized, in that they will eventually fail (usually after
about 3 years) if and inevitably when there are voltage fluctuations in
the circuit above 16 volts. (If you Google: "Mitsubishi + Blinking
Green Light of Death", it's amazing how many other Mitsubishi
rear-projection TV owners have experienced this problem.) It is
recommended to install either 1000uF/25 volt or 1000uF/35 volt
capacitors as replacements, so that they will be more than ample to
handle any voltage spikes that will occur.
Since I have little/no experience repairing printed circuit boards, I
was a bit intimidated to try this on my own, but was motivated by the
one person at that forum that said he'd had to pay $600+ for the
replacement DM module his set needed, along with about $150 for
installation.
I went online to another HDTV forum and this time found two similar
"fix" articles describing the same problem and correction, and one of
these articles came complete with photos depicting the repair
procedure. This led me to believe that this might actually a legit
repair, as others had posted that they'd successfully repaired their
TV's w/this procedure. On Sat. night I went to Radio Shack, bought the
(4) 1000uF/35 volt capacitors recommended as replacements (they were
out of the 1000uF/25 volt caps), and after taking the back of the TV
apart and removing the faulty DM module, got my girlfriend Rene to help
hold the DM module's printed circuit board while I desoldered the old
capacitors and installed the new ones. (She was a remarkably patient
assistant, I might add...)
Much to my dismay, after getting the TV put back together enough (I
thought) to test it at about 12:30 a.m. Sunday, it would still not
work, and exhibited the same "Blinking Green Light of Death". I went to
bed VERY disappointed...
Sunday morning, I set about taking it BACK apart, to see if I'd done
something wrong or left something disconnected. I then realized that
since I'd not installed the back cover plate for the DM module, which
has (apparently critical!) grounding straps essential to the proper
functioning of the DM module - the DM was not getting proper grounding.
My brother, (who is an electronics tech for a local LED lighting
manufacturer) came over before I reassembled the TV and also found a
couple of "solder bridges" on a couple of the DM's printed circuit
board components (sloppy soldering), which he feels might have also
contibuted to the failure of the original power supply capacitors. I
put it all back together again, plugged it in, and it fired right up!
NOTE:
I went ahead and ordered a full kit online. Came with service manuals for the set and detailed pictures of how to do the repairs. Took me about 2 hours, but my Mitsubishi is up and running! contact:
[email protected]
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