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I have an an acer extensa 5420. It has a CD/DVD player. The CD works fine, but even when I dvd is in the dvd player, the computer says there is no disk in it when I push play.

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  • jennh13 Jul 03, 2009

    But why would the CDs work in the same player thingy?

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Is it the same with all DVD's? If so then the Drive is faulty and would need to be replaced, are you on warranty and do any dvd's work?

Try to open the dvd - press start -> my computer or computer -> then open the dvd drive when you have dvd disc in there.

If you can't open the drive to see files, and dvd movies or dvd programs / games don't work then the drive is faulty, the laser optics are failing, the cd works but the dvd reading doesn't work anymore the laser would need to be replaced but due to low price of the drive its better to replace the whole drive than to try to repair.


Posted on Jul 03, 2009

  • 1 more comment 
  • Ekse Jul 03, 2009

    The CD is on a different laser frequency to DVD. The lens can no longer produce / read the DVD's frequency and is faulty.

    The drive would need to be replaced, not intelligent repair since the price of a new drive is so cheap.

    the CD laser and the DVD laser are different. The light
    from a DVD laser has a wavelength of 640 nanometers where the light from a
    CD laser is 780 nanometers. The smaller DVD laser wavelength allows it to
    focus on the smaller pits in the DVD disk. Thus, accounting for the
    increase in storage capacity.




  • Ekse Jul 03, 2009

    Its like the laser is out of focus and like a human eye it would need glasses to read...

  • Ekse Jul 03, 2009

    For the drive to read two types of discs it needs to be able to produce the right laser for the disc to read it.

    It can still produce the one ment for CD's but it no longer can produce the DVD reading laser.

    So the drive needs to be either repaired or replaced.


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