Equium A200: Mat****a UJ-850S reads DVDs but no CD's

Posting on behalf of a friend who is having issues with her Equium A200. It has a Mat****a UJ-850S DVD drive, this is where the problem lies.
The DVD drive will read and play original media such as films but will not read any CD's, whether they be original or CD-R's.
She has phoned up support who asked her if she had iTunes installed and told her to follow some steps to delete upper and lower filters in the registry.
She has done this (although didnt have lower filters), the problem still remains. It sounds like a hardware fault to me, thoughts?
Cheers

>It sounds like a hardware fault to me, thoughts?
Yes, it could be possible that an hardware is faulty.
I mean it sounds like the laser lens has been stressed and it cannot calibrate properly in the right direction in order to read the CDs.
But before you would try to replace the driver I would recommend testing one thing;
You could try to boot from recovery disk and could reinstall the whole OS.
Note; everything will be erased from HDD using such recovery disk. So backup the data firstly.
After restoring you will get a notebook with factory settings and then you could try to read from a CD disk.
If this will not be possible then there is a hardware issue

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Internal...
http://eshop.macsales.com/static_pages/Framework.cfm?page=superdrive/sdl_powerma c_g5.html
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http://eshop.macsales.com/shop/firewire/optical-drives/

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Product Name:HP Pavilion 15 Notebook PC
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Help us to help you by posting the following information.
1. The complete Model Name. or Product Number. of the notebook - see This HP web document if you don't how to locate the model number and\or product number.
2. The complete version and name of the operating system you are using ( ie Windows 7 64bit ).
3. Is your notebook still covered under warranty? Check your warranty status Here.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
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For me it was very simply and short login procedure.
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Did you test the drive with different CDs? Audio, data, etc
But nevertheless, try to remove the drive from the device manager. After rebooting, the OS should recognize the drive again. If after this procedure the drive will not read the CDs so in my opinion there is a lens calibration problem. I dont know why it is happened but the unit is under warranty. In this case the drive replacement will be done for free.

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SuperDrive does not read DVDs, but burns them correctly.

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DVD Rom (CS4 DVD: doesn't read, OSX 10.5 DVD: reads) STRANGE...
DVD-R Video and DVD-R Rom (burned today by this MacPro with Disk Utility and Verified OK: Asks what to do - like with empty DVDs. On the iMac the same DVD video works perfectly)
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On an iMac here it works perfectly. I forgot to mention that, but I tried of course. None of the 4 DVD rom from the CS4 design premium works on the Mac Pro.
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Equium A200: Mat****a UJ-850S reads DVDs but no CD's

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