Flashing status light

Not sure if they can be swapped out....you may want to get the schematics or service manuals and check

Mitsubishi TV troubleshooting
Here's something that might also be useful. After you turn on the set, and get the regular red blinky lights, hold down the Device and Menu buttons together for about 5 seconds.
The Power light will start to flash in a two digit sequence.
For example, 3 flashes, then 7 flashes = 37.
Here are the error codes, and the corresponding problem:
12 = No error detected, check power supply.
32 = Lamp Cover is open.
33 = Air filter cover is open.
34 = Lamp abnormality
36 = Light Engine (DMD or Lamp Fan stopped)
37 = Exhaust or Lamp Ballast Fan stopped
38 = Lamp Temperature High
39 = DMD Temperature High
41 = Short is detected
44 = DVI cable between FMT and Engine disconnected

The light is flashing in a pattern. Count the flashes and contact a Mitsubishi Service center with the count. They should be able to say what's wrong. This will not be user serviceable.

start with the lamp.

ther are some bad capacitors on the dm board in this tv, but this model is not layman friendly, we usually send in the entire chassis to Mitsubishi for a rebuild this cost about $300 then there is the cost of service also, this job will probably cost around $5 or 600 dollars.

Have they replaced bothof the STKs in TV?

your air filter cover is loose or not on.

You are Kidding right?

The only thing a flashing yellow light means on a Mitsi is the lamp access door is not installed. Read the manual and you will be fine.

Similar problem with my Sony. Unplug for 36 hours from the wall and it fixed my problem

possible that over night your set took a power surge ,possible power supply fault.