The tv suddenly goes black and the power light blinks red

Does the tv screen flash on and off when first switched on?Does the standby light slowly blink twice and then go out? If these are your tv's symptoms then please see my recent previous posts regarding this fault.This is very likely a backlight led issue.How old is the tv?

Hi,

If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.
https://www.youtube.com/watch?v=TR2iWN6b-LY

https://www.youtube.com/watch?v=TR2iWN6b-LY LCD TV Repair No Power Power Supply Common Symptoms Solutions How to...