Hi my name is Eric,
I hope I can help you with your issue ,
The TV not starting/booting properly could be the capacitors on the power supply or the whole module
A servicer will charge between $250 and $650 to repair it replacing either the capacitors or the whole board.
here is a DIY (do it yourself) solution:
It could be just a few bad capacitors on the FMT Module also,but most likely the power board
if you want to attempt the repair yourself you can do a visual of the power board caps will appear swollen on top.
We do not recommend do it yourself, but depending on your knowledge and technical ability you may be able to.
with the back removed you will see metal shields covering the board all the way to the left, it has a few capacitors in it that will appear swollen like the photo, cylindrical, soldered in. They are marked on the sides with the positive/negative and MF and Volts values) . these are very tricky to unsolder and install.
Mittsubishi uses 1000Mfd at 16Volts rating capacitors, they cost about $1 each (680mfd will also work fine) usually I replace about four of them (or all the bulged on top ones) .
The Module and back unscrew with a medium philips screwdriver, if you do not know how to desolder and resolder then do not attempt this as you may damage the TV more than fix it.
Im am posting a photo of some swollen caps on a board so you know what they look
best of luck to you
Hope this helps, if it has solved your issue please click accept
But if you have more questions please respond and I will reply asap