My tv clicks to come on but no sound no picture

Sounds like you had a power outage?-- did the lights go dim for a few minutes, before the power actually went out?-- Sometimes, low voltage will cause the compressor motor to over heat-- so it might have to 'cool down'-- What happened next?-- Did you try it again an hour or so later/-- Tell us more-- Mack B

Hello David
It sounds that the back light inverter board, and back light CCFL lamps to your TV need to be checked. It will be best to contact any service technician, because to check its back light CCFL lamps, you must disassemble the display panel, a very skilled work indeed. If you are sound in electronics, you can check it. If you wish to know more http://electronicshelponline.blogspot.com/ check this link. It has details. Pull up older posts there by its left side bar, or see it in 'Timeslide' option.

you tube might have blown ouy that's a big problem.Next time make sure you plug your TV in a surcharge protector

If there was a power outage durring the night it is possible that the power supply or the TV mother board could be effected-- even if there was a thunderstorm.
So in this case you can also check to see if the fuse if blown as a protection or that the SMPS is damaged.
Please remove plug remove rear panel to get access to the circuit.
see the link for tips on SMPS repairs.

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

The clicking you hear is probably caused by a relay that controls the incoming AC to the main power supply. This is a protective reaction to a problem in the power supply itself or an overload due to a failure downstream from the supply. This is not a likely DIY repair. You will probably need a technician to determine which of these two likely problems it is.

this sounds like bad battery conections. take a part the terminals and clean off the corrosion. more than likely the is some corrosion that is hidden and once everything is clean and tight it should fix your problem.

well lcds have 2 boards power supply and the main one incharged of all your imputs sounds like its the power supply one it went bad the reason dont know or bad labor go to www.shopjimmy.com and look for it with your tv model and # it will be cheaper than the manufacturer for the same part and cheaper than the tv repair man that told what was it only he was charging to much just to repair it for that buy a new one for less

could be blown flyback transformer

The bang you heard was probably a capacitor. Since you are still hearing the TV attempt to power on, your power supply and it's fuse are likely fine, but if the capacitor was on the mainboard, the TV would require service unfortunatley.