I have samsung ln 4665f lcd...clicks but will not turn on

SOURCE: Samsung LN-T4032H LCD

Most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.

If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

SOURCE: my samsung lcd tv is clicking and wont turn on

Sounds like a warped color wheel which is part of the light engine assembly. That is the assembly which has the bulb.

SOURCE: Samsung LN-T-4665F will not turn on. Red button

Yes! there are 2 capacitors in power supply 5vdc standby out..recommand repalce with 1000uF 25v.
also one at 12vdc out. same with 1000uF 25v.

SOURCE: samsung tv just clicks when turned on comes on

It could be a faulty power supply (capacitors). To all who are having power supply issues: Samsung is now acknowledging a problem with faulty capacitors. I called 1 800 726-7864 and they said they would repair certain out-of-warranty TVs if the problem is related to the capacitors. I just called and they are sending a service rep out to diagnose the problem

SOURCE: i have a samsung full hd tv LA46F81BDX/XSA and

You need to replace a few capacitors in the power suply. The tops of them will be swollen up instead of flat.