Shot in the dark. Acer PD113 came back today, fantastic fast turnaround by Acer, It's had a new mainboard fitted, fully tested. Turned it on and it went for long enough for me to see the new firmware, very impressed loads more features than the old board. Then it shut itself off and the fans ran for two mins then put it into standby, and I can't get it to come out of it. Even off/on at the mains, still in standby. I know the simple answer is it's busted, but i can't be that unlucky can i. Any OTHER suggestions on things i can try before i call them again would be gratefull.