Shows unkown disc when i put in a burned dvd-r but it will play a store boughten disc what disc format is compadible with yhis unit

Yes, review the manual and find out what formats the unit will read. you then tailor your cd/dvd burning sw to that format. Also make sure the unit can understand and playback mpeg files.

format data coded not supported
convert it through a converter software . eg,XVID TO VOB.EXE or MPEG it will work

The exact model of DVD player matters. Not all models can play a Computer burned disc.
There are several types of DVD
A factory type DVD in DVD format
A burned movie in MPEG format
a burned disc in DivX format.
Etc.
Try burning the disc with a DVD Creator program, not just 'Burn to DVD'. It's not the same thing.

this item will not play store bought disks it is for recording and burning blank disks you need a normal dvd player

If you are loading a store bought DVD and that it what it say's. The transport needs to be replaced. roughly 150-200. If you are loading "burned" DVD's the format may be wrong and the unit cannot read it. Best suggestion I can give you is to first buy a "Laser Lens Cleaner" on that uses fluid. Any electronics store sells them for 15-20. Run it thru the unit a couple of times then try a clean, store bought DVD. If it plays, problem solved. With your DVD's, if you have any liquid car polish like mother's or meguiars, put a couple drops on the disc and spread around with your finger, let it set a couple then buff off with a microfiber towel. This works wonders for old scratched cd's and dvd's and helps protect new ones from getting scratched. As for the Lens cleaner, run it thru every product you have that uses discs 3 or 4 times a year, it's the best preventative maintance and only maintanance you can do on a CD player DVD or PC. Hope this helps

try playing on computer. if ok copy on hard drive and burn it. if it wont work on your computer. there was an error in the making of the disk..

CD-RW drives can only read all CD-rom and CD-RW formats and read DVD formats but cannot write to a DVD, if you want to write a DVDs you need to buy a DVD-RW burner which can burn all CD-formats

You don't need to format the disc, as it does this during the burn process. What you may find is that your NEC dvd player does not play DVD+R. If you can, re-burn the video on a DVD-R 8.5GB.

You can also compress the video to fit on 4.7GB dvd. Download a program called DVD Shrink 3.2. Put the disc you burnt in the drive, and run DVD Shrink. This will analize the film, and all you need to do is click on Re-Author and lower the compression. It even has a line to show how big the video will be on the disc. On a 4.7GB dvd, you don't want this any higher than 4,430MB.

Hope those work

Tim

Check all the connectors of the board . The problem may be from SMPS section there may be faulty condensers which does not function properly. Try to replace the condensers and replace the paper connectors then the problem will not occur

MPEG-2 video is the file format you’ll need to convert to, but you cannot simply burn the MPEG-2 to a DVD and automatically play it in a DVD player.
The easily way is to buy software that will make the transition smooth; I recommend VSO Convert to DVD.