DVL-909 Laser disc don't always start

I just got a Panosonic LD/dvd player on ebay and it has an odd problem that hopefully somebody can help me with It plays DVD's fine all the time but almost always doesn't "recognize" a laser disc. The symptom is it will load and position the laser but not start the disc spinning but after a few seconds opens the tray and ejects teh disc.The blue light that indicates that other than a Laser Disc is loaded blinks the whole time Ocassionally 1 in 5 to 10 times it immediately recognises the laser disc I get the message that the component outputs are being turned off I get teh spinning disc Icon and that the disc starts spinning. and the blue light goes off. Once started it works great To rule out a dirty disc I can have tried several disc and even run then stop it and never remove the disc and then it won't start Hopefully somebody has seen this and I can avoid the ned to return it Thanks in Advance BOb