I just recently started to experience a problem with my unit. When I try to insert a DVD or a blank DVD I get a message : "UNKNOWN DISC PLEASE CHECK DISC AGAIN". I have tried several DVDs several times with no success. I've had this unit for some time and had no previous problems with it. This just started recently. What can I do?
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Try a different manufacturer/brand of DVD-recordable disks.
If you still have the problem, then your drive is malfunctioning,
and you need to get a qualified technician to disassemble your computer, and replace it.
* the disk you're inserting is not "empty" -- try it on a different computer;
* you should try a different manufacturer of "blank" disks;
* you need to upgrade the "firmware" inside your CD-writer, to recognize more brands of "blank" media;
* the CD-reader is malfunctioning -- when you "cancel" the burn-attempt, and insert a commercially-produced program CD or commercially-produced audio CD, can those disks be properly read?
* you have two CD/DVD devices in your computer, and you're inserting the "blank" disk into the "wrong" device.
Was going to leave this question? Normally computer will react that way when a blank disk that is not formatted is put into the drive. The blank disk then requires formatting and will function. Not sure if this answers your quesiton. Sorry.
OK. Finally "solved" this problem. You must use the brand name "Maxell" DVD disks, 2x or 4x (maybe 8x). Do not use variable speed disks (e.g. 1x--4x) or 16x. Walmart carries these!
The DVR -RW 2x finally got mine to record. I didn't think this would work, but it did. I am still experimenting with it. Had to download (free) VLC player to get it to play on my computer. Works fine in other DVD players.
Credits to the Sears' repairman, the guy at F., and my patience!