Will not play many new dvd's - Pioneer DV-300-K Player

if your trying to play dvd r or dvd rw ( copy dvds ) some dvd players wont play them. but if its original dvds your trying to play, try using a lens cleaning kit

Did you check the Instruction book for compatible disc list?

yes all resent dvd's changed to DVD VR mode (DVD Video Rom) where it used to be only DVD R, you might also having a problem on zones, if the new one come form anywhere but Australia there is a zone different and it will not play (just because you brought it here doesn't mean it came from here)

Are you trying to playing recordable DVDs (DVD+R or DVD-R) ? if so, try playing original DVDs (the type you rent or buy) those are pressed DVDs - if it works, then your player does not support DVD-R or DVD+R - If you are using a computer burner that supports bitsetting you can change the booktype of a DVD+R to DVD-ROM to fool your player.

If however your player cannot play either DVD-R, DVD+R nor original DVDs and only plays CDs, then your dvd laser diode is finished - there is one for CD and one for DVD, this is rare but happens, there is nothing you can do, any repairs would be very expensive - you are better off getting a new DVD player they are very inexpensive now and any repairs will cost you multiple times a new DVD player.

Time to buy a new DVD player. Try using Sony or Samsung dvd player.

check for the jumper settings of your dvd drive,remove all jumper and machine will configure it automatically to default

go to device manager and scan for new hardware changes or try to update the drivers for the device..
if it doesnt work try to reinstall the power dvd 6 or update it with a new version...btw poer dvd 8 are available now

thankyou

1.bad rca jacks
2.could be connected to wrong audio lead rca jack
3.the settings in dvd player donot match the receivers example- dts or ntfs
4.make sure its regioned to your player some audio isnt on the disks
5.pc's usually have new cd formats that came out
cd's and dvd's for some reason in this age isnt being able to play fully in older equipment do to the change in cd/dvd formats which makes you go out and buy new equipment it happened to me not just 2 weeks ago bought a new dvd and found out it wouldnt play in my year old dvd deck had to go out and buy new dvd deck then disk and all my others played fine

Unit probably has a defective disk motor that is in border line failure. When problem again arises, have the motor replaced

If it is a blue ray, you need a blue ray dvd player.