Why does the power light blink when the power is on?

You may have a back lights problem.

To test the back lights, you need to disconnect the cable between the main power supply & the main board, apply the AC power to the power supply, if the back lights are not light up, or blinks, the back light are defective.

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
If blinks continue without any pause, the main board is faulty.

Toshiba CX36F85 36" TV Blink - Questions - Fixya

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Toshiba CX36F85 36" TV, blink related issues. ... Every brand TV will have its ownblinking ... stand by light blinks 6 times, wont power on tv is only 4 years old. ...From the number of blinks occur at one time switch ON, you can get an idea ...

Toshiba CX36F85 36" TV Blinks - Questions - Fixya

www.fixya.com > ... > Toshiba > Toshiba CX36F85 36" TV

Toshiba CX36F85 36" TV, blinks related issues. Get free help ... Every brand TV willhave its own blinking codes. From the ... Push power button and it ... and then ... stand by light blinks 6 times, wont power on tv is only 4 years old. Junk! it wont ...

Toshiba power light blinking not turn Standard (CRT ... - Fixya

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wait for the light to go out then press power. Then if it doesnt power up hold the menu and the Device/input buttons on the set both in together for 5 seconds the light will blink a series of blinks pause briefly then blink another number of blinks then pause then it will repeat the same two digit blink sequence a few times . Let me know the two digit blink sequence.

Ok This is how to troubleshoot the TV, there are lights on the front and you are mainly concerned with two of these lights (the power light and the OPC light). I) If non of the lights come on then this is a AC Power failure (There is a loose connection or you need to check the Power/Inverter unit or the Main unit) II) If the power light is blinking at a rate of one blink per min and the OPC light is off (then there is a CCFL backlight problem) III) If the power light is blinking at a rate of two times per min and the OPC light blinks at a rate of one time per min (13V/UR10V failure you need to check the Power/inverter board or the main board). IV) If the power light is blinking at a rate or two times per min and the OPC light blinks at a rate of two times per min (3.3V Main Failure check power/inverter board or Main board). V) If the power light is blinking at a rate or two times per min and the OPC light blinks at a rate of three times per min (UR6V failure check power/inverter board or Main board). VI) If the power light is blinking at a rate or two times per min and the OPC light blinks at a rate of Five times per min (Panel 5V failure check LCD control unit or control panel).

If you have sound and no picture, it's time for a new lamp.

In the manual check under LED indication, It explains the blinking lights, unless your outside at night looking up!

need to know how many time the red light is blinking there should be a pause. 4 blinks is a fan, 3 blinks is the lamp door is not closed 6 blinks is thermal sensor.

first check the power of your system because if power is not working properly then light blinking.and then the condition of the capacitor on the board.

if the power light blinks and the status light is off, check the lamp door. if the power light blinks and the status light is steady red or blinking green, you have a power supply/ballast issue. you may have to send it in for repair. try www.avsolutionsny.com.

The power light indicates a problem (usually) with an internal problem. Usually there is a pattern to the light. (for example 3 blinks then a pause, 3 blinks then a pause etc.)

A service tech can use the code to help determine the problem.