Compaq 400 320 321 420 421 620 and 621 Notebook PC and 420 and 620 Notebook PC - Page 95

Power switch board

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5. Release the ZIF connector (1) and disconnect the power switch cable (2). 6. Rotate the top cover up (1) and off the base enclosure (2). Reverse this procedure to install the top cover. Power switch board The spare part number for the power switch board used in all models is 605794-001. Before removing the power switch board, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. 2. Disconnect all external devices connected to the computer. Component replacement procedures 87

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5.
Release the ZIF connector
(1)
and disconnect the power switch cable
(2)
.
6.
Rotate the top cover up
(1)
and off the base enclosure
(2)
.
Reverse this procedure to install the top cover.
Power switch board
The spare part number for the power switch board used in all models is 605794-001.
Before removing the power switch board, follow these steps:
1.
Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2.
Disconnect all external devices connected to the computer.
Component replacement procedures
87