After replacing lamp the red lamp light remains on. Lamp will come on for a second then go out. About a minute later the red lamp light comes on and unit shuts off.

Replace the lamp. The red lamp light is indicating an issue with the lamp. You can get the replacement lamp with installation instructions from www.tvrepairworld.com

Three flashes is lamp cover/lamp position error, it means the lamp cover is not set right, or the lamp is not in the right position. There are two micro switches to detect the lamp position, and lamp cover. Please reset the lamp and the lamp cover (door).

Lamp is possible----

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

Hello
Look at the number of blinks of the status light.
[1] If it blinks at one cycle (0.5seconds On and 2.5seconds OFF) : Lamp cover error or lamp housing error. Replace the lamp cover or lamp housing correctly.
[2] If it blinks 2 cycles (0.5 seconds ON and 0.5 seconds OFF): Temperature error. The projector is overheated. Move the projector to a cooler position.
[3] if it blinks at 4 cycles (0.5 seconds ON and 0.5 seconds OFF): Fan error. Fans sill not work correctly.
[4] If it bliks at 6 cycles (0.5 seconds ON and 0.5 seconds OFF): Lamp fails to light. Wait a full minute and then turn on again.
[5] If it blinks continous (Red): Lamp has reached the end of its life. Lamp replacement messege will be displayed. Replace Lamp with same type and number. After replacement reset lamp hour. OK.

Ballast Board it is what powers Lamp.
Encompass Parts 1-800-638-3328

the lamp is near the end of it's life. time to replace it.

Chances are the lamp is not bad. Is the lamp door reseated properly? The is an interlock on that door that must be activated in order for the set to turn on. If the unit was woking before the lamp went out this may be the problem

Having similar issue with my PT-44LCX65. Lamp blew and replaced it (last month), never figured out how to reset timer. Now red indicator light blinks once every 5 seconds and after about 4 minutes TV goes black.... Any ideas?

The problem is most likely a defective lamp. See your owners manual on lamp replacement as this can be done by the consumer.

no, had the same problem. Its the lamp ballast also called the lamp power block. It supplies power to the lamp, any how some repair shop wanted $450 to fix it, so i ordered the part from sony, part #146879816 ($116.25), trust me this is the part I double checked with many different places. Any how fixed it my self took about 15 minutes, just take the back cover off and the part is right there just kind of follow the screws and the 3 wires, super easy job, I suggest you replace the bulb at the same time, dont by a cheap bulb just get it from sony