Cant play store bought movie dvds on my zv427FX4 dvd recorder

SOURCE: portable dvd player will play music cds but not video dvds

Chances are, your DVD player uses one laser to read CDs, and a different laser to read DVDs (since Cds and DVDs are read at different wavelenghts of light). If the DVDs you're trying to watch work properly in other DVD players, it probably means that the DVD laser is dirty, damaged, or burned out. Though you can try cleaning the laser (use Google for suggestions on how to do this, or check the Audiovox website), you will most likely have to get the DVD player repaired, or buy a replacement. Many of the newer CD/DVD players sold today use a single combination laser, which reads both CDs and DVDs, which means that when the laser fails, it will not work at all. Wish I had better news for you, but I guess that the only consolation you have is that your Audivox player still works with CDs...

SOURCE: DVD Recorder/Player won't accept DVDs

I think your Laser Lens or drive needs to be cleaned

SOURCE: Won't play dvds.

Hi, All. I found this discussion based on a Google search because I was having the same exact problem with playing Superbad on my Philips DVDR3400 after renting the movie 3 times and confirming the DVD played on my computer, etc. The good news is I was able to fix this problem. Go to Philips support at http://www.support.philips.com/support/html/index_us_en.html From that link, enter the model number of your DVD player into Search. Select your player from the list that comes up, and on the next page select "software & drivers" link at the left. This will take you to the firmware upgrade for your exact model which updates the software that runs your DVD player (also, when trying to find your exact model..such as mine was DVDR3400/37...you can find it on the label on the underside of your DVD player or it is on a sticker on the back side of your user manual). This takes you to both the link for the software download as well as detailed instructions on how to do it which are very clear. That includes how to use your remote to check that the version you will upgrade to is newer than the current version on your DVD. This was quite easy so long as you are comfortable with downloading the software to your PC, unzipping and then ripping to a recordable CD disc. You will then put that dics into your DVD which will read the files and upgrade itself. The whole upgrade process on the DVD itself took about 5 minutes. When it was done rebooting after it upgraded, I powered it off/on. Then I played Superbad, laughed and had a good time ;)

SOURCE: recorded dvds wont play in other dvd players

You have to finalize the disc. if the disc goes to the end it will finalize the disc automatically. If there is some part of the disc not used you have to do it yourself. IN DVD MODE PRESS SETUP, THEN DISC EDIT, THEN FINALIZE. FINALLY PRESS YES. That should do it.

SOURCE: DR 389 DVD player

Try one of these:

1) Press 'setup' on remote control
2) Move down to the 'lock' picture
3) Press '0000000'
4) Select region code as '0'

Or

1) Power on player with no disc in tray
2) Press PAUSE
3) Key in 314159
5) For multi-region, select 0
6) Press PAUSE again
7) Power off player
8) Wait a minute turn it on.