LG LED Smart TV model 42LB5800-UG won't turn on but red light flashes 3 times then off

SOURCE: Screen Turns Red and then TV shuts off

you red crt is shorting out.tap the neck of the red crt lightly to try to remove the short.if no go also inspect the neck board.

SOURCE: red led light flashes 6 times and tv won't turn on

Hi friend,,,,,,
it is an indication of an error code ,,,,,,normally 6 blinking code refers to an power set up problem,see incoming voltage with an multimeter.......

thank u,,,,,,,,

SOURCE: Philips 42PF7220A/37 42'' TV (LED flashes red 7 times)

Five buck solution; If you have any tek skills at all and are feeling adventurous; UNPLUG THE POWER, remove the back panel; You will be faced with the mainboard. In the lower right quadrant you will see two small capacitors, like tiny yellowish coke cans. If these are bulging, there lies your problem. These must be replaced. If you have no soldering skills, take only the mainboard to a fixit shop and have them solder in the two capacitors easily found on line. No guarantee's but worth a try

SOURCE: LG 50 IN. PLASMA TV MODEL # 50PC1DR . POWER

Power supply board is dead,replaced the power supply board will get power.

SOURCE: lg model 42pm4m plasma monitor won't turn on, red

Does the tv make a clicking noise like its trying to turn on before the tv goes into standby and the LED starts flashing? I suspect this is due to a shorted component, most likely to be in the 5V(switching) line and just want to be a bit certain before we start testing the power supply.