Unit will not acknowledge presence of disc.

see the cause and remedies:
Does not play disc

1. No disc. - Load a disc into the tray.
2. Disc has been loaded upside down. Place the disc with the label side up.
3. Disc region code does not match region code of the player.
4. Disc type is not the correct type to play.
5. Disc is damaged or dirty. Clean the disc or try another.
6. Moisture may be condensed inside the unit. Remove the disc and the leave the power on for one or two hours.

Finally the OPU, optical pickup unit contain lasser bean NOT reading the TOC disk +Syscon can be defective, you must go to the repair shop TV for fix it

Hi Dear,

First Install the burning software and then try to write the DVD, may you have try to burn without burning software.

Click hear and get the Burning software, see the instruction of mention below.

Data Compilations

• Burn, backup or copy your files to CD, DVD or Blu-ray Discs.
  Supports recording from command-line and BAT scripts for automating routine actions.
  Supports CD-R/RW, DVD-R/RW, DVD+R/RW, BD-R/RE and DVD-RAM media, including high-capacity double-layer media.
  Supports UDF (Universal Disc Format 1.02-2.60), Bridge and ISO9660 (Level 1-3, Romeo), including Joliet Unicode extensions.
• Create Bootable CD or DVD. Use it as a very big floppy boot disc for recovery purposes.
  El Torito creation support with advanced options: emulation type, sectors, platform, load segment and boot message.
• Append or update Multisession discs.

Multimedia Compilations

• Create Audio CDs. Play a CD on your traditional CD player or car stereo.
  Supports MP3, WAV, WMA, OGG, M4A, AAC and FLAC audio formats and M3U playlists.
  Supports title and track CD-Text, including Unicode.
• Create DVD-Video discs and MP3 CDs/DVDs.

Disc images

• Make and burn standard or boot disc images.
  Supports ISO and CUE/BIN image files.
  Supports UDF (Universal Disc Format 1.02-2.60), Bridge and ISO9660 (Level 1-3, Romeo), including Joliet Unicode extensions.
• Copy disc to ISO image. This feature can be used for disc backup, as well as for disc copying.

Utilities

• Erase re-writable CD, DVD or Blu-ray discs.

Thanks

"Unable to read the disc" or "Disc could not be read" Messages
If you are getting one of the above error messages:

• This message can display if you eject a disc during game play. If this is when the message displayed, make sure that you return to the Wii Menu before changing discs if you wish to play a different game.


• If your Wii console is laying flat, it may be positioned upside down. Ensure that is positioned right-side up: the game disc slot should be above all three buttons and the SD Card slot.


• Ensure that you are properly loading a Game Disc.
  • If your console is placed vertically, the disc label will face to the right.
  • If your console is placed horizontally, the disc label will face upwards


• Check our list of specific game issues to see if there is a known issue with that particular title.
• If you know you are inserting the Game Disc correctly, but are still have the same problem with only one game (or if you only have one game), try cleaning the Game Disc by following the disc cleaning procedures (click here).


If the above information did not resolve the issue or it is happening with most or all of your games, a repair is necessary. Please note: So that our technicians are able to duplicate the issue, please include at least one sample game disc that causes this message to appear when played. Click here to set up a repair.

When you try to play a DVD movie or an Xbox 360 game disc on your Xbox 360 console, you may receive an error message. This article presents step-by-step guidance to help you determine whether your disc is playable.
SYMPTOMS When you try to play a disc, you may receive the following error message: Can’t read this DVD.
CAUSE The DVD or game disc may be dirty or damaged. Because the console cannot read the disc well, it may even mistake a game disc for a DVD and report this error. If this problem occurs with multiple discs, even clean and undamaged discs, there may be a problem with your Xbox 360 console.
Note If you receive a different error message, such as one of the following messages, the problem is a different problem:
Error message 1 Can't play DVD. Wrong region code. Error message 2 Can’t play DVD. Family settings restrict playback of this DVD. If you receive one of these error messages, see the corresponding Knowledge Base article: 907620 While attempting to play a standard DVD movie using your Xbox 360 console, you receive the error message: "Can't play DVD. Wrong region code" 908645 While attempting to play a DVD movie using your Xbox 360 console, you receive the error message: "Can’t play DVD. Family settings restrict playback of this DVD"

THINGS TO TRY Here are some things that you can do to try to fix the problem or to determine what caused it.

Determine whether the disc is dirty or damaged Discs that are smudged, scratched, or otherwise damaged cannot be read by the Xbox 360 console. You will want to examine the disc to see whether it has smudges, scratches, or other damage. To do this, follow these steps: 1. Examine the disc for dirt or damage: a. Pick up the disc by its edges. Do not touch the top or bottom surface. b. Examine the shiny side of the disc to make sure that the disc is clean and has no damage.
NoteScratches that follow the curve of the disc are very damaging and prevent a disc from being read. If your disc has even one of these kinds of scratches, the disc is damaged, and you will no longer be able to play it. If this is the case, see step 4. 2. If the disc is dirty, clean the disc by hand: • Use a soft, clean, dry, chemical-free cloth to clean the disc. • Lightly wipe from the center of the disc outward. 3. After you clean the disc, try to load it in the Xbox 360 console. If the disc still will not load or you receive the same error message, the disc is damaged, and you will no longer be able to play it. If this is the case, see step 4. 4. If the disc is damaged, do one of the following: • Because DVD discs are not game discs and the disc was damaged because of misuse of some type, such as not storing the disc in its case, the only thing that you can do is buy a new one. • If you feel that the disc was damaged by the Xbox 360 console in some way, please contact Xbox Customer Support. To do this, please visit the following Microsoft Web site: http://www.xbox.com/support/contact

if it's a fat PS2 and
model SCPH 30001, SCPH 35001
(not including the models with an 'R' after the model #.

these models need the following to play DVDs:
- PS2 DVD remote with IR unit
- PS2 DVD disc player (sold with DVD remote w/ IR unit)
- PS2 memory card

you copied the DVD disc to the memory card. you used the memory card to play DVDs.

later models didn't need the memory card to play DVDs.

hope this helps :D

Have you tried purchasing a better quality disc?

hi. the actual lens assembly has become unstable and this is misaligned the lens. it is unable to line up correctly with the inserted disk so that it may recognize and read the data. when this occurs, the default reading will be WRONG DISK.

You with have to replace the entire lens assembly, which is one whole piece, to actually restore this unit to its original state.

Please rate and god less:)

Made a video showing how I fixed this exact problem on a Wii.

I belevie you have problem in laser assembly it might not worth to repair it
Cheers