My dad has got the above problem with his Panasonic DVD recorder.
It's been doing it for weeks ... the problem started when he put in a new DVD-Ram disc but then he couldn't eject it. Eventually he managed to eject it (he can't remember how now) and recently put in a retail DVD.
Whenever you plug the recorder in, it goes into a "self checking" loop and won't do anything else - all you can do is pull the plug out. But when you plug it back in it repeats the "self checking" loop.
Anyone had this problem before ? Looking round the internet, it appears it may be a fault with the machine which can only be fixed by Panasonic ?
TIA for any help.