My Goodmans GTVL19W17HD LCD set is nine years old.
Suddenly the picture keeps going off and I have a blank screen.
The sound is not affected. Switching off and back on restores the picture, but only for a short while - ranging between 10 seconds and 15 minutes. Then it fails again.
Is it skip time, or is it repairable. Any TV engineers out there?

TomUK, February 2016

If you can see a faint (but dark) picture - you may need to hunt for the best angle - that could point to a failed backlight inverter. As the other contributor said: It will certainly be repairable but only you can judge the likely cost of repair versus the cost of a new TV - with a warranty.

Alternatively, if you are up against it - why not look in charity shops? The British Heart Foundation do electricals

Such is our throw-away society, February 2016

Clearly your TV has a fault in the circuitry that delivers the picture - it seems to be dependant on how long the set has been on for - a heat related fault - it might be a failing component or a poor joint (which amounts to the same thing).

Sometimes a confident amateur can track down a fault like this with controlled tapping and/or freezer spray. But it really needs test equipment - circuit schematics and experience.

It will certainly be repairable but only you can judge the likely cost of repair versus the cost of a new TV

Amazon offer a 19" TV with built in DVD for under £90

Good Luck..., February 2016