I have a samsung lnt5265f and it makes a clicking noise but never powers up

This sounds similar to a known problem with bad capacitors in some Samsung TVs. Even though the TV is out of warranty, Samsung extend the repair period for affected TVs. Get your TV model and serial number off the back and then call Samsung at: 1-800-Samsung (1-800-726-7864).

Explain the problem and let them know that you have heard about similar problems and heard they were being repaired out of warranty. In my case, they sent a tech out and did the repair for free.

If for some reason they will not do it, the repair is quite simple for someone who can solder and you can find details here: http://www.thebuzzmedia.com/samsung-tv-capacitor-clicking-issue-and-free-repair/

No need for manual or will find one because the tv corporation don't release them.Go to Shopjimmy.com,Ebay.com.Type in tv model Samsung LNT5265F power supply board and compair picture to ur tv power supply board.Ask questions to sellers.Buy it,and replace it.

Yes,If LED power light keep flashing.If it go off and no pictture show up,than ur Main Tuner Signal board is dead.

you have one or two bad caps in the power supply board these can like devices will be puffed up on the top and the values are on the side replace it or them and your good to go

the power supply board has failed. call 1-800-samsung to find nearest repair/parts center

power supply needs replacing. most common problem for all samsungs.

sounds like a tv I had ,probably a bad power switch on the tv. its switching on and off w/ bad contacts.
Call for repair

Dont have a solution, my samsung 46 inch is doing same thing. Have you found a solution?

The issue has been resolved. I removed the back of the TV (pretty easy actually) by laying a blanket over the kitchen table and placing the TV face down. I started with the power supply as an obvious beginning. Both fuses on the board tested fine. And touched up every solder joint with a hot soldering iron in case the problem was a cold solder joint. After this painstaking venture, I performed another visual inspection and noticed a capacitor that had a thin black X on the top of the can. This is a common sign the capacitor has over heated. I located a replacement for $1.20, installed, and successfully powered up the TV. I have had no problems since.
Oh, yeah, I also paid $120 for a BN44-00150A replacement power supply, plus overnight shipping. It actually arrived three weeks later. That was two weeks and six days after I fixed the power supply myself.
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I am having the exact same issue with an LG42LB5D... anyone have any thoughts?