Hehe yeah, strangely that's often the case :iagree:
When my Philips DVDR-5500 quit playing/recognising any kind of blank or burned disc, the brands in question a) were TY and Verb, and b) previously played (or burned, in the case of my Verbie RWs) perfectly on the same machine. So no dodgy brands here, although the machine could have needed cleaning.
Odd that the problem began to occur about 6 months after I had it though, when my previous Philips players never needed cleaning in all the years I owned them.
And don't even get me started on the DVDR-5500's [well-documented] freezing-up problem - usually, right when you were wanting to record something! :a
EDIT: agree with others, since the disc brand isn't mentioned in the OP unless I missed it, that disc quality/badly burned discs may well be a problem. :iagree: