Power cut out when Polaroid p40led13 tv was on .it won't switch on now but when I plug it in an on it flashes red and 7 times then black screen and 1 min it has the red standby light on

If you are using the standard SNES cables with the round red, white and yellow 'Jack' plug connectors they are referred to as "Component" connections. On your remote there should be a button marked "COMP". It will probably be near the top of the remote near the Power button. This should switch the TV to the channel you need.

Obtain your owner's manual and see what that error code means, then follow the manual's recommendations.

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://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.

Are you talking monitor rather than tv? I have an LG 22 inch monitor and the on off button is on the bottom, If I don't hit it right or just tap it, it won't turn off but flashes. Where do you have it plugged in? Is it with some other electronics, or right to the wall outlet? I'm really at a loss as to what your problem really is. Are you using the remote? One quick fix might be the battery's in the remote. If they don't have enough power, short or no signal will be sent to tv or not being able to decipher it.

Try changing the input device to something you are sure, works such as a DVD player.

Switch off TV manually, switch off power, remove plug and retry after 48 hours.

If problem persists, please refer it to a qualified service technician.

replace the power supply board. You should be able to get the replacement power board from www.tvcircuitboards.com send them a email [email protected] if you dont see it listed as they only list a few of the boards they carry

wait a few day then turn it on if it does not come on ask someone to check it out

acoustic solutions lcd tv when i switch it on the screen flashes blue, green then red no picture??? it was working ok last night any ideas?

i had the same problem. i opened the panel in the back of the tv (3 screws) and opened the aluminum panel (3 screws). there's a red led light located at the bottom left corner of the top board. to the right of the led light, you will find this thing with 4 switches. i turned the two bottom switches "burn" and "epmw" to on. so far tv have been working.