Try first leaving the TV power cord unplugged for some times, let say one hour or so.
ensure that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on dvd with no receiver box
If that does not work, and you keep having a flashing
led on front of the TV, and tv turning off by itself after a while,
that indicates a fault condition.
The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.
internal circuits are jammed because of electrostatic
chargesaccumulating on capacitors, or because of a wrong voltage read
by themain chip on your monitor controller board. this started the
2 The protection circuit detected a wrong
voltage or abroken contact, identified an internal fault and kicked in
, startingthe flashing light.
If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.
If you are in situation 2 , then there is an internal fault.
that can occurr are a blown capacitor on power board, a
convergence IC has blown, or a fault on Digital board.
the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you
can get same flashing statebecause of the video cable.
Try moving the video cable, and if the cable is not built in, then also try a replacement cable.
If under warranty contact the manufacturer ringing the number on the user manual
If you want to repair at your own expenses, just locate any good qualified repairer.You can find parts here.