[Elecraft] K3 wont power on!

[Rich]

Hi all

Have been using new K3 (7049) for a few days and whilst turned on today it
just powered off, was not doing anything sat the time but sat in RX.

When I try to switch on I heard a relay click very softly but nothing,
checked psu (have other items connected to it that work) and checked power
cable with a meter, all ok there, fuse is fine in it.

Now when I try to turn on, nothing at all, not even the light click sound.

I have searched and not found anything on the groups so am hoping someone
might be able to point me in the right direction or some suggestions on
what to test?

Have had K3 at 100W and lower power too.

Thanks

Rich