TV was shutting off on its own but very sporadically (could be months, weeks, or days). As time went by, shutting off was occurring more frequently. To fix the problem, I did the following:
1- restart from remote control
2- unplug/replug tv
3- unplug/replug into different outlet
4- open lamp door and close it.
5- leave it unplugged for overnight
6- unplug, remove lamp door, replug, start it (to make it fail due to open door), then close door and restart.
When it shut down and I unplug/replug, most of the time, the led-indicators, gave the following:
timer --> solid green
lamp --> solid green
temp --> solid red
Also the fans were running when the leds were on. Basically I had to play with the above fixes until the led indicators were cleared and the fans stopped running.
In the past few days, the TV would only run for a short period of time (half hour to couple of hours) then shut off.
Is this a ballast problem?
Is this a lamp problem?
Is the problem even bigger than these two?
I had contacted a Samsung tech, DM techs, and a couple of other techs and they all gave conflicting possibilities:
- lamp
- ballast (DM)
- DMD board (Samsung tech)
- Power supply board (Samsung tech)
I just need some help because now I am tired emotionally with this tv

Thank you for reading and for any advice.