FixYourDLP.com Forums

Last attempt at getting some help from the board..Then shes off to the dumpster.
My wife keeps telling me "We need a new TV" lol
I keep saying No, im gonna fix this one.
Anyway............Here it goes:

Why is my set turning off after a couple seconds.
I first replaced the lamp and with some help from a member (Night Kid) I got it working fine. (the lamp door wasnt completely shut)
Now sometimes it shuts off after a couple seconds when i turn it on. I will turn it back on and it keeps doing the same thing. Sometimes i hear the sound and no picture. But eventually it shuts back. 1 minute.

No weird noises. It actually turns all the way on for 30sec.
Serial#RU52SZ51D
Lamp ser# dont know the exact serial of the lamp but it is identical to to one i removed.

Please help anyone. I love this TV

Hello Magicman,
Right off the bat I think this is going to be a ballast problem, but do not worry and if it is, tell your wife you CAN fix this! The ballast is what powers up your lamp and connects directly to it and from the power supply, it is a 3 by 6 inch board that has just 2 plugs and a couple of screws, nothing to cut or solder. Before I try to help, I need a little more info on your 52" LG
How long have you had it?
How many times have you changed a lamp?
What indicator lights are coming on?
And are you sure you're not getting a short "buzzing" electric sound? this regularly happens when it fails to ignite or shuts down...

Thanks!

Thank you, Thank you, Thank You PEPE.
How long have you had it? About 6 or 7 years i believe.
How many times have you changed a lamp? Once about 3 years ago and again 3 weeks ago when i started getting the shutting off problem.
What indicator lights are coming on? (gotta check later, but i believe its a orange blinking.)And are you sure you're not getting a short "buzzing" electric sound? this regularly happens when it fails to ignite or shuts down...
No, I dont hear any pertruding buzzing sounds. If its low i will check closer today when i get home. I have the plate off of the back near the center.
But like i said it does come on sometimes and then shuts down after 1 min. Sometimes just the sound and no picture. There is something else i noticed: When i turn it on and there is no signal from the cable box the screen is dark with the "NO SIGNAL" indicator on. Which is normal. When it recieves the signal from the cable box it tends to shut down. Maybe that info may help as well.
So im 140.00 bucks in on the new lamp purchase.
If there is a ballast problem, whats the cost?
Again thanks for the reply and help. This board is my only hope.

As far as my knowledge goes, there is only 3 parts that can prevent the TV from turning on. One is the lamp, another one is the ballast, and third is the color wheel.
Since you already installed a new lamp, then it safe to say that it’s not the lamp, that leaves the color wheel & ballast. My suggestion is that you take a look at the color wheel. See if it’s damaged, or won’t spin properly. If it’s OK then I would replace the ballast.
I know it’s a game of trail & error, but it’s the only thing at the top of my head.

Thanks for the reply.
How do i locate the ballast? and how do i remove it? where do i get another one?

Hello magicman320.
The ballast is located near the lamp enclosure, here is a reference guide from a Toshiba so you can get an idea, obviously its not the same. http://www.fixyourdlp.com/forum/viewtop ... f=4&t=1528
If you do plan on buying a new one, look for it online, with the part number ( printed on the ballast) & TV model. Try http://www.discount-merchant.com/ , Samsungparts.com or Ebay.com
Hope this helps you out.