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Re: WS-55511 Blinking Light
You need the V21 DM repair kit you can get it at the following link that has all the parts and full detailed instructions with pictures on CD so you can do the repair yourself in about a half hour. Clearly illustrated just click on repair kits on the left side of the page where the catagories are. yours Is the V21 Kit. Heres the link. http://servicemanuals.vstore.ca/
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1. The DM unit (caps and or fuses) are bad---no longer made and only (to my knowledge) PTS electronics repairs/rebuilds them.
Less likely but Possible: remove front speaker grill and inspection
plate behind it----locate the two bundles of wires from front keyboard
on set and follow them down and to the right---unplug both plugs and
plug set in and wait 70 plus seconds and try to turn set on with
The blinking light is the DM trying to boot up--if set works with front keyboard unplugged---the tiny reset switch on it is bad.
There are 2. One controls the front panel and the other controls the front output. Unplugging it will not interfere with the remote. In fact, you will only be able to operate the tv with the remote. Let me know how you make out. Incidentally, I sent an email off to Mitsubishi and surprisingly they got back to me in a day. I informed them about the problem all these people are having and they are actually looking into it. They even offered to pay for my new front panel. Go figure!!
I had the same problem with the blinking light on the front of the TV and it would not power up. I read all the problems everyone was having and thought I was going to face a huge repair bill. The service guy came out, pulled off the front panel where the speakers are and disconnected the circuit for the front display panel. 3 1/2 minutes in my house, $90 service call. Apparently, when you give the TV too many commands at once, it's safety feature is to"shut down and lock up". He mentioned also that sometimes when these sets get to be about 4-5 years old, the wires in front can "leak" causing a shortage and then locking up the TV. I keep the circuit unplugged and operate the TV solely by the remote. Give it a try, what can it hurt!! Hope this helps.
If you are still having this problem, the tv has a bad DM board there are four caps on that have gone bad. It is cheaper to have the board repaired then replacing . Call a local factory authorized dealer, it should cost around $400.00 to repair.