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please one thing remember that red led blinking indicate specie fault please watch red light count and find the correct fault which is written below
Monitoring Items Number of Flashes of red led Main Power Supply Voltage Error 2
Backlight Error 6
Internal Temperature Error 7
Audio Error 8
Digital FE Error 10
Trident Error 11
Balancer Error 13
T-CON Error 14
By blinking led it show there is some fault. By counting the blinking you can be able to identify which part or board is faulty.
If you wiah to get some more details about flat panel television repair and error codes then check the following link. http://electro-medical.blogspot.com/
If you have a voltage meter there are some things you can check. Unplug the unit and remove the back cover of the set. Then Plug the unit back in. You will need to tape down the lamp safety switch in order to do these tests. Here are all the failures that would give you a lamp error and what to check. Cause 1. Unit powers on and works properly for a while then shuts off with a red lamp led(lamp error). Suspect bad lamp and replace. Cause 2. Unit does not power up correctly and you have red lamp led(lamp error). Check the lamp enable line at connector J14 on the back of the light engine. If pin 6 does not switch to 5 volts after turn on, but your 12 and 5 volt supplies are good, then suspect a defective light engine. Cuse 3. At power on the lamp turns on and off 3 times and then the unit shuts down with a red lamp led(lamp error). You have a defective light engine. Cause 4. Unit does not turn on correctly and you have a red lamp led(lamp error). Check for 12 volts at connector J9 pin 4 on the light engine. If voltage is missing check for an open fuse F9A09 on the power supply board. If it is open, then you need to replace the fuse and you still have a defective light engine. Cause 5. Lamp enable line at connector J14 pin 6 on the light engine does go to 5 volts at turn on, but does not drop back to 0 volts after 5 seconds, but your 12 and 5 volts supplies are good then you have a defective light engine. Cuase 6. Check for 5 volts at connector J9 pins 1 and 2 on the light engine. If low or missing check Capacitors C9A37 and C9A38. Values are 3300MF/10V. Replace capacitors if defective.
To reset the drum message:
Open the front door
Press and hold down the white button for about 4 seconds.
Once all 4 LEDs are lit, release the button.
Close the front cover.
Make sure that the Drum LED is now off.
When all lights flash it's a service problem. You press and hold the go button and see what lights are on then.error light means main PCB failure, Toner light means fuser failure, drum light means laser failure. Toner and error light means main motor error, drum plus error light means its a fan failure.
The blinking red light at the the front of the television is the "Diagnostic STANDBY/TIMER LED".
This little red light will blink 2, 4, or 5 times and then stay off for three-seconds. And blink again for 2, 4, or 5 times. This cycle repeats. The most common diagnostic code is the 4-blink code.
When the red LED blinks 4-times, it means one of two possible causes:
1) +13V is not supplied on the A-board. Or, 2) IC502 is faulty.
It is best to take this television set to a repair facility and ask that the +13V power supply be repaired.
The copper tracks and integrated circuit pads are very thin and delicate on the KV-24FV12 circuit board, and will easily lift off of the circuit board, if the incorrect desoldering tool is used. Unless one has a good quality PACE vacuum desoldering unit, one should not attempt to repair the television.