I need LG TV model no 21FC2RGE-Tx circut diagrem

It is the problem of T-CON (timing and control board) on your TV.

Re-seat the ribbon cabled connected to the TCON output side carefully.

What is the problem you faces? Provide more details; please. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Your power supply still has a problem. Maybe, it is not regulating the voltage.

i have lg 21fc2rge-ty tv i want know that circuit q804 transistor number

Get it at MatEletronics.com ..hope this helps..

I believe that to be the Viper 5701 model, , if so, here is the instillation guide, hope this helps!

There is such thing as power supply unit for LG 50PC3D Plasma TV with panel model PDP50X30010.Part number is 68709M0046A. LG part number is 6709900020A.

most likely a bad power supply but you will need someone to check it who understands this type of circut it may be just the supply but it may also be another fualt that cuased this part to fail. so its a bit technical. you can also get a lg specific model tv service manual and check "no power" fualt area troubleshooting tips. hope this helps

More likely it's because of power circuit of your TV set. If you are not trained enough in repairing TV sets, appeal to your local repair center

hello. you are not alone, this is a common problem with alot of new lcd and plasma tv's since they operate with high internal voltages the circuts have built in protection. any slight power fualt or short in the circut will cuase a sos or shutdown. may be a number of different reasons or even a shorted fuse.
it needs to be checked you have a power issue.
some models if there is a blinking led the number of blinks indicates the fualty area.
your tv needs service.

hope this helps