Panasonic DVD-A120 DVD Player
You must have bad DVDs
I have the A310 and am looking to replace it after about 18 months.  It skips periodically and freezes up.  More often than not when I put a new disc in it tells me it's the wrong format.  The Panasonic rep insists I  have bad DVDs.  Can't explain why they play on my computer DVD and not the  Panasonic, though.  Panasonic is not on my list for a replacement.  Sad.   Like many others I used to be a Panasonic/Matsushita fan.  At least I can  still use it as a single-disc CD player....