Service Reference Guide, dx7300 433611-001 7–3
Removal and Replacement Procedures— Slim Tower (ST) Chassis
7.2 Unlocking the Smart Cover Lock
If you have locked the Smart Cover Lock use Computer Setup to unlock the lock. Refer to the
Desktop Management Guide on the Documentation and Diagnostics CD for more information
about the Smart Cover Lock.
If you cannot access Computer Setup to unlock the cover you will need to remove the locking
solenoid by using the Smart Cover FailSafe Key (Spare part number 166527-001 or
166527-002). Once the solenoid has been deactivated or removed the access panel can be
removed.
The Smart Cover FailSafe Key will be needed in any of the following circumstances:
■ Power outage
■ Startup failure
■ Processor or power supply failure
■ Lost password
To open the computer cover with the Smart Cover Lock engaged:
1. Prepare the computer for disassembly (Section 7.1).
2. Using the Smart Cover FailSafe Key, remove the tamper-proof screw 1 that secures the
Smart Cover Lock to the inside of the chassis.
3. Push the metal arm that wraps around the air vent grid up and back 2 to free the Smart Cover
Lock from the chassis.
4. Remove the computer cover (Section 7.5).
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