Aristona no disc error

18 month my Aristona 650 dvdrecorder worked good

since one week a get the message : " no disc"

no disc" indeed the dvdrecorder plays not any disc

the discs I recorded myself but also musicdvdees I bought cannot be played

Bad quality? the Atistona dvdrecoder is made by Philips

Who has the same problem?

who has an solution for this problem?