7-segment display board
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© Copyright 2006 Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice.
The only warranties for HP products and services are set forth in the
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omissions contained herein.
Part number: 436504-001
First edition: November 2006
About this document
This document details procedures for replacing a failed 7-
segment display board in an MSA6X/7X Series Enclosure.
Before you begin
Before removing the failed component, make sure
that you have the replacement part available. Removing a
component impacts the airflow and cooling ability of the
To prevent improper cooling and thermal damage, do not
operate the enclosure unless all bays are populated with either
a component or a blank.
Do not remove more than one component or blank from the
enclosure at a time. Doing so impacts the airflow and cooling
ability of the device. To avoid possible overheating, insert the
new or replacement component as quickly as possible. If the
internal temperature exceeds acceptable limits, the enclosure
may overheat and automatically shut down or restart.
Parts can be damaged by electrostatic discharge. Use proper
Verifying component failure
Use the following methods to verify component failure:
Check the 7-segment display board LED display for
activity. If the LED display is not illuminated, the
component may have failed.
No power to the 7-segment display board can also be
an indication of the failure of the riser board, the power
supply, or the midplane.
Check the host log for errors.
Removing the 7-segment display
Power down the enclosure:
Power down any attached servers. See the server
Press the Power On/Standby button on the enclosure.
Wait for the system power LED to go from green to
Disconnect the power cords.
Extend or remove the enclosure from the rack in which it
may be installed:
Loosen the front panel thumbscrews that secure the
enclosure faceplate to the front of the rack.
Disconnect the cabling and extend or remove the
enclosure from the rack.
Remove the access panel:
Lift the access panel latch (1).
Slide the access panel to the rear (2).