my preamp wont power up

You can turn the screen off on the Ref 5. But there is still a green dot lit in the center. The screen default is on.

If it worked when it was unplugged, my guess it is something simple. Unless you kept it in a bathroom I doubt the humidity is the cause. Is the power cord pushed in all the way? Are all the tubes seated properly? Is the 6550 in the power supply lit up? Do any of the tubes light up? What exactly does it do and not do?

Lemon?

Hi,theres nothing at all.the plug is all the way in,the tubes are seated properly,nothing on the screen.I may have to get a specialist onto it.

Try a different power cable?

Yep done that,and a different wall plug.