Dadam TFT Fault

Hello :-)

A 15" Dadam TFT monitor I bought over a year ago has just developed a fault
(typically just out of warranty) and appears to switch off every few
seconds. It looks like the monitor goes in to standby mode, but rather than
the green light turning orange (as it did previously when going in to
standby mode) it stays green. Switching the monitor off and then back on
with the power button sorts the problem ...... but the monitor does this
several times a minute.

I've tried different changing the power pack, the lead between the PC and
the TFT, and have even tried connecting it to several different machines,
but the problem persists.

Has anyone come across this before, or has advice about how I could fix it?

Many thanks!
Simon