Unfortunately, without being able to inspect the unit, it would be difficult to determine what's going on. I'd recommend having the unit inspected before replacing it with parts that might not solve the issue.
I have a Samsung HLN617W DLP TV. It is about 5 years old. The screen keeps going out and I assumed the Lamp is bad. I bought new Lamp and replaced it but Now issue is that when I turn on TV, I see screen comes on for about 3 sec and then it shuts off TV. After that all three lights in front of TV starts blinking. After a while all blinking lights stop blinking and TV shuts off completely.
I replaced the Lamp again but same problem exist. When I hit power switch, It goes to startup sequece, meaning fan starts, Bulb comes on, Color wheel starts(I hear noice) and then screen comes on for about 3 secs and then everthing stops.
After checking few internet sites, it may be a bad Ballast but I am not sure. Is there any way to know what is going on before I spend the time and money replacing the ballast?
Thanks for your help