I have a Mitsubishi WD-73727. It comes on with just blue screen and for just a few minutes the OSD works. Now nothing works. Still have blue screen but no on/off or any control from remote or front panel.

Part 1 Mitsubishi WD 73727 DLP Color Distortion Distorted Fix Repair V28...

Hello,
There is a software update that is available for some Mitsubishi dlp models. The wd-65c9 is one of them. When I experienced your problem, I went to the website, downloaded the update, and installed it on my tv and boom, its fixed. It's super easy, free, and takes a few minutes.

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.

blue screen usually is signal related. it will shut down after a few minutes if it doesnt detect a signal.

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

my mitsubishi 73" set is 4+ years old. all of a sudden the color is all wrong. after a couple of minutes of clear picture the colors change--blue is green and red is yellow. a little while later everything has a red tint to it and there is a line going down the center of the screen. to the left the picture is still relatively sharp, but the right hand side is terrible. I'm hoping this is just the lamp.

Rick
Woodland Hills, Cal.

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.

If no video and OSD is good then: Suspect the Signal PCB part # 930B923002