General discussion


DVD-drive won't recognize any DVD

By redandblueglasses ·
I have a Matshita UJDA770 DVD/CD drive that won't recognize a prerecorded DVD, or any DVD for that matter. Will only recognize audio or data CD's. Any thoughts? It says the drivers are correct and working appropriately.

This conversation is currently closed to new comments.

Thread display: Collapse - | Expand +

All Comments

Collapse -

Bad laser

by NickNielsen In reply to DVD-drive won't recognize ...

DVD lasers operate at a light wavelength of 650nm; CD lasers at 780 nm. A DVD drive has one of each laser inside so it can recognize both types of disc. http://articles.techrepublic.com.com/5100-10878_11-1047035.html

The 650nm laser in your drive has failed. Replace the drive.

Collapse -

With a bit of a stretch

by seanferd In reply to Bad laser

I find that the chosen username is slightly ironic compared with the subject. It would be more within-bounds if it were bluray vs. CD.

Excuse my off-topic meanderings...

Collapse -

EXCUSE THEM ??? ! ! !

by santeewelding In reply to With a bit of a stretch

My dear Seanferd, they are not only not excused, they are accepted and encouraged!

How are you doing in your lab with the frozen chickens? Have you settled on the embedded system?

Collapse -

Blue, Orange, Red

by NickNielsen In reply to With a bit of a stretch

What's 300 nanometers among friends?

Collapse -

What Nick is telling you is that the DVD LED has lost

by HAL 9000 Moderator In reply to DVD-drive won't recognize ...

Intensity and is no longer able to read DVD Media. The unit will work with CD Media as that has a different LED to generate the Laser beams that are used to read the Disc's.

This happens predominately because people leave Disc's in the drive when they are not required and the LED that works with that type of Disc is left running all of the time that the Disc is in the drive. After it reaches a set number of hours it is no longer able to generate enough light to read that type of Disc.

You should not leave Disc's in these drives and only place a Disc in the drive when it is required. If you need to have a specific Disc in any Optical Drive you should download some software to create a Virtual Drive and load the contents onto the Computers HDD. This will allow you to not need to use any Disc in the Optical Drive and where the Disc is required to run a program it will give you significantly faster access tot he contents of the Optical Disc by running it as a Virtual Drive from the HDD. Depending on who you look at the times to access Data on a Virtual Drive can be up to 100 times faster than what it takes from an Optical Disc. So if a Optical Disc is required to run a game the game will be much smother and there will be less lags while the computer scans the Optical Drive for the required data.


Collapse -

I was going to ask you something earlier.

by Ron K. In reply to What Nick is telling you ...

What virtual DVD software do you use?

Collapse -

Ron, I'm spoilt

by HAL 9000 Moderator In reply to I was going to ask you so ...

I was given a copy of DVD neXt Copy Virtual Drive which I like.

Apparently that company gave away copies of that software to anyone who bought DVD neXt Copy which I use to backup my wifes DVD Collection. I looked at the D Base that I have of her titles and it's now at the 1875 mark and growing.


Collapse -

I suppose this may be a silly question at this stage, BUT, have you

by Deadly Ernest In reply to DVD-drive won't recognize ...

considered the concept that your system may not have the validated codecs to be allowed past the DRM?

Some recent upgrades to DVD reading software, have tightened up on this significantly, and a lot of stuff that used to play no longer works.

The actual drive operation can be checked out by placing a home made data DVD in the system and see if the drive recognises this and reads, if so, the hardware is OK, but the software needs attention. If this fails, toss it and buy a new DVD R/W.

Related Discussions

Related Forums