HP CD-Writer Plus User Manual page 41

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Replacing an Existing CD-ROM Drive With a CD-Writer Plus
15B. Secure the drive into the bay using the screws included with your drive or
any M3x0.5x6mm metric screw. (Do not use a screw longer than 6 mm.)
If your computer uses rails or mounting brackets (see step 6) you may not
need screws to secure the rails in the bay.
Use all four screws
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4
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