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dvd is working but cd is not recognize

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by junart

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good day!!!its my first time to this forum...anyone can help me to explain why my dvdrom is working only on dvd and not recognized the cd format..i'm using hp pavilion dv6000 model with hl dt st dvdram gsa t20n ata....tnx

4 replies

by oh smeg

Firstly it depends on the CD Media being used if it is a Recorded CD the Die Lot may be the wrong colour and the Laser is unable to read it.

If it is a Pressed CD the most likely thing is that the LED that provides light for the Laser is blown. The DVD ROM's, Burners use a single LED to provide both colours of Laser sometimes with use one of these colours can fail and no longer work.

When this happens the best option is to replace the drive with a new one.

Now the most common reason that these fail is that a Disc is left in the drive all the time and this shortens the life of the LED. If you are not constantly using the Drive for something it's best to remove the Disc. But if you constantly need a CD in the drive for some form of Data it's a better option to install some software that Makes a Virtual CD and copy the CD contents directly to the HDD. If you do this you'll be rewarded with hardware that doesn't fail as often and much faster loading times for the Data on the Virtual CD.

Col

by willcomp

Colin - been celebrating the New Year already?

DVD drives have 2 lasers under a single lens. The CD laser has a longer wavelength (780 nanometers) and hence less energy. The DVD laser has a shorter wavelength (640 nanometers), more energy, and more precise focus. If one of the lasers fails, you can't read or write media associated with that laser.

by oh smeg

I need to get a Life. :_|

In the last specifications that I got from Sony they are using a Bi Colour LED to generate the light stream. This has 3 Legs with a common earth and 1 leg each for each colour or Wavelength depending on how you like to describe things.

Col

Now I've got to go and watch the Fireworks. B-)

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