78 Installation and Service Guide
Replacing Parts
5 Connect the 24-pin power cable to the 24-pin connector on the motherboard.
For the location of the motherboard connector, see page 59. The cable is keyed to fit only one way.
6 Make sure that all power connectors are properly aligned and securely connected.
7 Secure the power cables to the chassis using the two plastic clips on the base of the chassis.
8 Replace any tie-wraps that you may have removed or cut while removing the power cables earlier.
9 Reassemble the E-35A and verify its functionality (see page 82).
Hard disk drive (HDD)
The factory-installed HDD is formatted and loaded with system software, network drivers, and printer fonts. The
HDD is also used to store spooled print jobs. Available space on the hard disk drive is displayed in
Command WorkStation.
If you replace the hard disk drive with a new one, you must restore the backup (see page 90) or install system software
as described on page 96. (Spare hard disk drives are not shipped with preinstalled system software.)
It is unlikely that both the hard disk drive and the motherboard are defective. Avoid replacing both to solve one
problem. If troubleshooting strategies (such as checking cables and connections; see page 103) do not solve the
problem, and you suspect either the hard disk drive or the motherboard is at fault, use the following order to
troubleshoot: replace the hard disk drive, install system software, and then check to see if the problem persists. If it
does, perform other procedures, such as replacing the motherboard (see page 108).
Proper handling
• Use standard ESD “Precautions” on page 10 when grounding yourself and the E-35A.
• Keep magnets and magnetic-sensitive objects away from the HDD.
• Do not remove the screws on top of the HDD. Loosening these screws voids the warranty.
• Never drop, jar, bump, or put excessive pressure on the HDD.
• Handle the HDD by the sides and avoid touching the printed circuit boards.
• Allow the HDD to reach room temperature before installation.
HDD problems may be caused by the following:
• Loose or faulty connection
• Faulty data or power cable
Important: Do not replace the hard disk drive and the motherboard at the same time. Doing so in the wrong
order, without updating the system (see page 102), will cause the system to malfunction.
Important: Improper handling can damage the HDD. Handle the HDD with extreme care:
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