GRJ - Thanks to you too.
In my case I'd been running a PS 2 steamer for approximately 0.5 hr, then put it in neutral (and left it idling) while I answered the phone, and after no more than 2 or 3 minutes I heard the power down sounds start (without me touching the remote) and that was it. I assumed it might be the battery so I popped in a brand new MTH battery the next day (after properly charging it overnight) and tried to power it up but nothing - no sign of life at all.