NO disc error

Usually cleaning either the disc or the lens with any type of "thinner" other than dilute alcohol will destroy the disc or the lens - they are usually made out of a type of plastic which is very sensitive to chemicals - I would suggest you need a new lens assembly which is probably going to cost as much as a replacement player. If you haven't cleaned the lens yet then you can very gently clean it with a cotton bud that has been dipped in gin and left to nearly dry out. Hope this helps, sorry if it is bad news, always only clean discs with a soft dry cloth or dilute alcohol such as gin or small amount of soapy water (clean from the centre to the outside, not round and round) if there are serious scratches on a disc then metal polish such as brasso can polish them out, although there is no guarantee - try the worst scratch first and see if the disc works before doing the whole disc. If the player doesnt work with a clean new scratch free disc of the correct type, burned in the correct format for the player, then no amount of disc cleaning will help. Make sure the disc is finalised after burning, as many players require this. Hope this helps - if you can post back a couple of photographs of the player we can maybe identify the model for you :)