Wd-65731 air flow is block i am having the same air flow block problem with the wd-57731

Mitsubishi's product line includes a wide array of LCD, Flat Panel, and DLP televisions to suit your home entertainment needs. The electronics division has the distinction of inventing the first rear-projection television and selling the very first HDTV in America. Their 400,000 square foot manufacturing facility, located in Irvine, CA, boasts the ability to produce more than 1,000 projection TV's in one day. The company's oft-stated goal of unmatched excellence is driven by their mantra: "Technically, anything is possible." In June, 2008, Mitsubishi introduced a new premium flat panel TV with an integrated 16-speaker sound projector.
Warranty Information
There is in-home service on all big screen models, which have warranties of 30 days for screens and one year for parts and labor. The LCD televisions have a one year warranty on parts and one year on labor with carry-in service. For plasma sets, in-home service is available on all models. There is a one year warranty on parts and one year on labor. The faulty thermal sensor, mentioned in the commmon repairs section, is now covered by an extended 2 year warranty, as is the problem related to the optical engine.
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.

Remove the lamp and do a visual inspection.
If this is a DLP you may have a bad color wheel! whistling sound is a sign of color wheel.

Good luck to you

www.aaatvservice.com

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.

tv is overheating.  possible that fan not working or temperature protection circuit faulty.  check fan for excessive dirt first.  could be as simple as cleaning the fan

Mitsubishi has had some problems with these sets with the lamp cartridge(google the model number and look for how to replace lamp instructions) On some of the lamp cartridges they covered several openings with a fine screen like material---one is narrow and completely blocks up with dust---this will trigger the air flow message--if you get the lamp out and this screen is blocked, carefully clean the dirt off with a brush---if you don't get it soon enough it will kill the lamp----the replacement lamps for these sets use a bigger mesh that does not block with dirt---it blocks because there is a fan the pulls air and dirt into the set to cool the lamp during operation.


NEVER TOUCH THE FRONT GLASS OF THE LAMP WITH YOUR HAND

I do this here for free so if this helps you give me a vote here.

Call Mitsubishi at 1800-332-2119. Explain the symptom and they should be able to direct you to a service facility that will replace a Temperature Sensor at no charge to you. It is a known failure. Good Luck. Don't wait to call.
Skyassoc

"air flow blocked" means its getting too hot. or it thinks it is. it is quit common on these set that the thermal sensor has malfunction replaceing this sensor is your solution. since this is service bulliteen item at service centers of mitsubidshi products this may be an item covered under warrenty. so i would first check with you local service shop too see before

WD-57731 & WD-65731 Front Disassembly
57” & 65” Models Screen Frame
Removal
1) Pull off the Speaker Grill.
2) Remove all the screws (b) from the
upper rear cover (except one at an
upper corner to support the frame).
3) Remove 10 screws (a) from the
front of the screen frame.
4) Remove the remaining ***** (b)
(supporting the frame). Carefully
pull the Screen Frame from the TV
and disconnect the ES and LE
connectors.
57” & 65” Models Screens Removal from Frame
1) From the rear of the Screen Frame remove 20 screws (a) from the top and bottom rails
2) Remove 6 screws (b) from each side rail.
3) Carefully lift the Screen assembly from the Frame.


MODEL: WD-52631 / WD-57731 / WD-65731
Screen Replacement
CAUTION: Wear gloves when handling the Lenticular Screen and Fresnel Lens.
This prevents cuts and finger prints. Do not place Fresnel Lens in the sun.
This may cause fire and heat related injuries.
Lenticular Screen and Fresnel Lens Replacement
1) Apply LENS-TAPE along the rear top edge of the Lenticular Screen.
2) Place the Fresnel Lens on top of the Lenticular Screen, and apply pressure along the top edge.
3) Place the screens in the screen frame and reinstall the cushions, top, bottom and side rails.
NOTE: The Lenticular Screen label must face the front and the Fresnel Lens label face the rear.
4) Reverse the Screen Removal Procedure and insert the screens in the Bezel.
Lenticular Screen and Fresnel Lens Removal
1) Remove the top, bottom and side HOLDER-SCREEN rails and their cushions from the Screen Frame.
2) Lift the screens as a single unit from the frame.
2. Separate the Lenticular Screen and Fresnel Lens.
Note: When separating the Lenticular Screen from the Fresnel Lens, use caution
while prying the Screen and Lens apart. Use a slot type ***** driver, and
remove the pressure sensitive double sided tape.

see if there is dust inside blocking it.

1080p signal... THE MITSU. WD-65731 has a resolution of 1080p its just the res your PS3 is pumping into your screen is loaded with a little bit more pixels than you 1080p res MITSU. I suggest getting a MITSU WD-57731 since it has a 1080P/24 input. and has great clarity and HD ample for the BD of your PS3. however the differences in picture rate and quality is very small. goodluck.