The TV is about 10 years old. I've also timed how long it stays on which is exactly 2 1/2 seconds.
Ok, a model number would be helpful but:
when set turns off and green power light goes out: on the front of the set press and hold both the menu and input (device) buttons at the same time for at least five seconds and let both go.
Power light will blink a two digit error code like 2 blinks, 2 blinks, a pause and repeat it for a total of 5 times.
This is the error code and indicates where the problem may be---let me know what code you find and I will tell you what it means.
SD TECH
2 blinks 2 blinks, pause, 2 blinks 2 blinks ,pause, 2 blinks 2 blinks ,pause, 2 blinks 2 blinks ,pause, 2 blinks 2blinks
Very good! You have found the problem--2,2 is short protection.
98% chance here one of the two pico fuses that protects the convergence circuit is blown.
Need a model number here but it uses either one chip or two depending on model.
It means you have to get at and replace the chip/s and the fuse---for some of these models I have start to finish instructions.
you have several choices here:
1. A good tech can do this in the home(shops who say not are to be passed) in about an hour---cost varies but is usually 200 plus.
2. Several sites sell "kits" with all the parts needed (and some that will not be needed) for under 100 dollars and include instructions (general) for repair in your set.
3. If it is a model I have instructions for (based on doing repair hundreds of times) I can email those to you for free. Parts cost (I know a good place) will usually be under 30 dollars total.
This repair in all these sets is basically getting at the chip/s and pico fuses and being able to un-solder them and replace them and solder then back in place.
If you get me the model number I can tell you if my instructions cover it, what it uses for chip/s and how to locate the pico fuses etc.
For some people with just average skills this can be a do it yourself repair.
SD TECH
Thank you so much
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SOURCE: Tv won't stay on
i have seen this before and it may be the front power button being stuck and when your remote turns it on the stuck button turns it back off again. I have an older mitsubishi that will not boot up right sometimes and i have to unplug it and plug it back in fot it to come on. I used to pick up broken tv and fix the power buton and resell them
SOURCE: Mitsubishi WS-55857 won't turn on
Thank you for posting your concern details however i would be needing few more details from your side if necessary and allow me few mins to come up with the resolution.
SOURCE: Mitsubishi Model # WS 65311 HD 1080 turns on then shuts off.
try holding in the menu and input/device buttons on the front of the set both together and see if it blinks a series of blinks, pause briefly then blinks a second series of blinks, let me know what the blinks were sush as 22 or 24
SOURCE: mitsubishi medallion 1080 tv
try unplugging your convergence board and see if it powers on my samsung had similar problem except red timer light,anywho i unplugged mine and it powered up
SOURCE: I have an Mitsubishi HD 1080 big screen tv. When
Ur power ic inverter board is dead.
U need a new one.
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