My Mitsubishi WD-73727 turns on with a blue screen, resets automatically after <30 sec, turns off, then nothing happens. I turn it on and got a blue screen. The reset cycle repeats. Any idea?

Have you ever replaced lamp? I would replace lamp with an OEM mitsubishi lamp assy and re-intialize set in service menu. That should fix it

First is if you are able to get it to turn on and blue screen only appears it will shut down as no signal noted.

If you can get it on with Mitsubishi remote : Menu, 1,2,3 enter

This is the soft reset and the set also has a hard reset.

Try the soft reset first and let me know what happens.

Common Repairs
For the following models: WD-52631, WD-57731, WD-65731, WD-Y57, WD-Y65, WD-57732, WD-65732, WD-57831, WD-65831, the most common repair problem stems from television shutting off almost immediately after it has been turned on accompanied by the message, "TV will shut down in a few seconds. Please check if the air flow is blocked." According to the Mitsubishi website, this issue is caused by a loose connection as a result of a faulty thermal sensor. For models: WD-73727, WD-73827, WD-73927, WD-73732, WD-7383, the most encountered repair problem has been in relation to the optical engine. Another common situation consumers have encountered is failure of the TV to turn on along with unceasing flashing of the green power light. The solution for this problem, caused by the DM board, will vary by repairman. Consumers have also encountered issues with moving vertical or horizontal lines appearing on the screen which can either be due to problems with the capacitor, light engine, or formatter board. Make sure all bad caps are changed.

This cable attaches to the lamp,reach in behind the lamp case in the tv and hold it in place and reinsert the lamp make sure it plugs into the lamp securely.

Your Light Engine needs replaced. Usually around $600.00-$850.00

try this push menu and input for 5 seconds. this wll cause the lights ussally a number of times pause then flash another for example flash 1 time pause then twice this is a 12 code... which by the way means no errors been recorded this will help me determine what area to troubleshoot

Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.

The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded overs. To get fixed either call in a local TV repair company or goto sites such as Tv Repair Kits to get a repair kit with instructions. Here is there link.

http://www.tvrepairkits.com/xcart/home.php?partner=papa1dude

They have put together complete kits for most models that include the parts, step by step photo instructions, repair assistance, etc.

Sounds like one of your colors are missing. make sure all colors are lit, Blue, Red, Green

You will need to reset the Netcommand and tuner settings in the set. The little indented button in the front of the set needs to be pushed in (when the set is off). The front light will blink for about a minute or minute and a half. Then, reprogram the Netcommand settings. This should solve your problem. If you need more information, then, reply to this post and I will respond.

I Can Assure You That This Problem Is Associated With 2 Capicators On The Power Supply Board.