How do I repair my 46" Philips LED TV that won't turn on and is making a chirping sound when plugged in?

Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

The power supply regulator section is not working properly. It will be best to replace this board as card basis rather than trying to make it right. Philips have used some special numbered components there, which are very difficult to get from open electronic spare part market. Contact the nearest authorized service center for Philips to buy a new board.

At last you won?

This tv problem are also part the tv Convergence board problems too.The tv convergence board are toally dead have no power voltages activity to the tv convergence board at all.That why u only have chirping sound only.If ur tv convergence board that have some power voltages activity left and have dying parts on the tv Convergence board only.Tv will have picture but have problems R,G,B colors lines mis alignments,have colors shadows pictures or 3D pictures only.The tv convergence board must be repair like replaced 2 STK convergence ICS and some or all it resitors too.Will fix the tv convergence board will fixed the DLP tvs with chirping noises too.The tvs shops will cost u like $300-$350 for parts and labors to fixed the tv convergence board.

The tv power supply board it got short and already dead some how,tv have clicking noises mean ur tv power supply board are not stable and not regulating high voltages to the rest of the tv other boards.The tv power supply board that the board where the a/c power cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv power supply board for the replacement.

Tries unplug,replug it back like about an hour later.The tv now,will resetting itself back to the factory setting.The tv now should work.If not the power LED light indication on the LCD screen panel flashes or take 2 or 3 mins picture to come on.The problems is the tv power supply board,that the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.If tv was bought and it under a year old,call Samsung Corporation for a warrenty repair.

Power Lite LED indicator on the front panel bazel flashes?Ur power supply board is dead.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

sounds like a common problem that a kit is available from a place that has tv repair kits, you can Google it and look it up .
larry dillon

The power supply section is not working.
Common possibilities are:
- Convergences amps have failed overloading the supply
- High-voltage section (flyback transformer) has failed
(happens sooner or later, about 8 years typical))
- CRT tube has failed overloading the supply
- Power surge has popped the power input circuit.
(Fuse, rectifier diodes, turn-on relay etc)
- One of a hundred of electrolytic capacitors has failed short overloading the supply. They dry out with age, are cheap to replace, but hard to find which one it is,and it is caused of chirping sound....

This is a common problem with the Philips Tv sets. Get a repair kit from www.TvRepairKits.com.