I have a ws-55859. All of a sudden the tv stopped working - can't even turn it on. The little green timing light keeps blinking away. I've tried resetting. unplugging and then resetting. nothing. little green light keeps blinking. tv won't turn on either manually or via the remote. HELP!

The blinking light is what's known as the blink code. The blink code tells you what the problem is. To find out what it means, count the number of times the light flashes then Google your make and model with the words blink code added to the end. This will show you links to sites that will tell you what the problem is.

Common problem on some of these models...check www.TvRepairKits.com for a Mits blinking light repair kit.

The convergence board or the verticle is bad. needs professional repairs can cost anywhere from $ 180 to 350. Check it out at www.fixurtvs.com.

http://www.jeremyburns.com/Mitsubishi-Green-Blinking-Light-Fix.pdf

Video instructions for repairing Mitsubishi WS-55859 HDTV:

http://www.jeremyburns.com/Mitsubishi-Green-Blinking-Light-Fix.pdf

You can find the parts (capacators) at Radio Shack for appx. $2/each.

time to get a new one.
even you get the main board, you might have other problem that has not show up yet.

My WS-55859, Did the same thing. Power went out, when it came back on the green light in front of TV would blink, but TV would not power on. Did some googling and saw multiple posts for "blinking Green light" or "Blinking Green light of death". Most of the posts pointed to replacing capacitors on DM Power board. I followed the direction and it worked great. Note the TV shop guy who did the soldering for me said the capacitors "looked fine" and they were not the problem. I couldn't tell the difference between a good or bad capacitor, so I asked him to swap them anyway. He did, I plugged the board back in, buttoned up the back of the TV. After 60 seconds Green light stopped and I started watching TV again... Here is the link to the best instructions I found (http://hdtvoice.com/voice/showthread.php?t=32186).

Check any/all fuse devices in power supply.Let me know.....T.
By the way,the tv serial # is 107543. I assume the model # is
as stated==WS-55859.

You need to change the seven capacitors on the DM power supply board (inside the metal case on the left where your DTV tuner connects)They are 1000 MFD 16 VOLT capacitors and the tops are probably bulging outward because they are leaky- this is a common problem.When you lost power,the TV had to reboot itself but because of the leaky caps it never will and the green light keeps blinking.As long as you never lost power or unplugged the set the TV would of still worked.Once you change the parts and plug the set in the light will blink normaly for about a minute and when it stops blinking you can then turn on the TV.

This problem very well could be a DM board problem. I have a how to fix file if this is indeed your sets problem. Leave your email and I will send it to you. Good Luck