[torbjorn]

Most likely, the problem is due to a short circuit on one of the output lines from the power supply, maybe due to a failed line output transistor. Such faults are usually fairly easy to repair, and common to all traditionally built TVs or computer monitors.
Just make sure that when you have found, for example, a shorted semiconductor, investigate why it had failed before replacing it and switching the set on again. Perhaps there are dry solder joints somewhere in the line output stage, an open circuited flyback capacitor, faulty line output transformer etc.

[sheldon]

Our Sony television is about 8 years old 24 inch flat screen.
recently when we tried to turn it on nothing happens other than it makes the usual electronic grunt it always has made when the on switch or remote button is pushed....but nothingi happens other than the stand by or sleep timer red light blinks on and off.
No sound, no picture.
Is this a major problem or is it a relatively minor problem to correct?
I'd appreciate knowing before I go out and buy another set.
Anybody have any suggestions?

By the way we have two other much older sony televisions that continue to work very well.....but this more recent flat screen vega seems to have bitten the dust rather early.

Thanks for any advice you can give.