Two months later and I think I've now done it. Found most of this on www.avforums.com and the trouble is in the power supply which needs a new chip. Mine cost £11 which seems good value but does require soldering skills. The symptoms were: that continual "Self Check" annoyance, not able to open the drawer until it finally read, worked with much less “Self Check” if no disc in, would take 20 minutes or more to start up for a timer recording and would still be spinning the disc the next morning after the end of recording. Seems good for now but as I said before it’s only yesterday when I did this and time tells.
John.S., November 2008