IBM IntelliStation M Pro Hardware Maintenance Manual page 51

Note: If you are installing a drive that contains a laser, observe the following
safety precaution.
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices,
or transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product
could result in exposure to hazardous laser radiation. There are no
serviceable parts inside the device.
v Use of controls or adjustments or performance of procedures other
than those specified herein might result in hazardous radiation
exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view
directly with optical instruments, and avoid direct exposure to the
beam.
9. Touch the static-protective package containing the new drive to any unpainted
metal surface on the computer; then, remove the drive from the package and
place it on a static-protective surface.
10. Follow the instructions that come with the drive to set jumpers or switches, if
any.
11. Slide the drive into the drive bay from the front, and then attach the drive to
the drive cage.
12. Place the drive cage back into the computer.
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Installing options