TROUBLESHOOTING 103
Checking external connections
Before removing the side and front panels of the E-42B to check internal components,
eliminate the most obvious sources of problems. Make sure that:
• All interface cables to the system are plugged into the proper connectors
(see page 40).
• The power cable is plugged into the wall power outlet.
• The LED on the network port is blinking to indicate network activity.
Checking internal components
To check the internal components, you must remove the side and front panels of the E-42B.
Before you remove the E-42B panels, be aware of the safety precautions that you should take
when handling the E-42B. Use standard ESD precautions when handling printed circuit
boards and electronic components. To review the safety precautions, see page 11.
TO CHECK INTERNAL COMPONENTS
1 Shut down, and then open the E-42B (see page 40).
2 Before you touch any components inside the E-42B, attach a grounding strap to your wrist
and discharge any static electricity on your body by touching a metal part of the E-42B.
3 Inspect the inside of the E-42B
• Make sure that no foreign materials have been dropped into the chassis.
• Make sure that the DVD and hard disk drive data cables are connected to the correct
SATA connectors on the motherboard.
• Look for obviously loose boards and reseat each board securely in its connector on
the motherboard.
• Look for obviously loose cables and reseat each cable connector firmly.
• Make sure that each connector is properly aligned with its mating connector. If the pins
are offset from each other, the affected board will not function properly.
4 Reassemble the E-42B and verify its functionality (see page 85).
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