7-Segment Display Board; Before You Begin; Verifying Component Failure; Removing The 7-Segment Display Board - HP 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure Maintenance And Service Manual

7-segment display board

Before you begin

CAUTION:
Before removing the failed component, make sure that you have the replacement part available.
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Removing a component impacts the airflow and cooling ability of the device.
Do not remove more than one component or blank from the enclosure at a time. Doing so impacts
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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 MSA70 may overheat and automatically shut down or restart.
Parts can be damaged by electrostatic discharge. Use proper anti-static protection.
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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
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component may have failed.
NOTE:
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.
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Removing the 7-segment display board

Power down the enclosure:
1.
Power down any attached servers. See the server documentation.
a.
Press the Power On/Standby button on the enclosure.
b.
Wait for the system power LED to go from green to amber.
c.
Disconnect the power cords.
d.
Extend or remove the enclosure from the rack in which it may be installed:
2.
Loosen the front panel thumbscrews that secure the enclosure faceplate to the front of the rack.
e.
Disconnect the cabling and extend or remove the enclosure from the rack.
f.
Remove the access panel:
3.
Lift the access panel latch (1).
a.
Slide the access panel to the rear (2).
b.
Removal and replacement procedures 41