HP Contura 400 Compaq Contura 400 Family of Personal Computers Maintenance and - Page 7
Replacement Procedures, Once installed, the processor
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Models 400 and 410 This section provides a description of the system unit module components for Models 400 and 410. These components are accessed from the bottom of the computer: o Hard drive -- The hard drive is easily replaced or upgraded from the bottom of the computer. Remove two screws from the hard drive compartment cover to access the hard drive. The hard drive mounts to the system chassis with a hard drive bracket and connects directly to the system board with no intervening cables. The hard drive bracket attaches to the hard drive with four screws. o Memory expansion -- System memory can be upgraded with optional memory expansion boards. An expansion board is added or replaced from the bottom of the computer through the memory compartment cover. The memory expansion board connects directly to the system board with two connectors. o Battery pack -- The Nickel Metal Hydride battery pack is accessed through the battery compartment. To access the remaining system unit components, open the computer and remove the keyboard assembly. These components include the following: o Integrated trackball assembly -- The mechanical trackball is centrally located at the bottom of the keyboard assembly. The assembly consists of the trackball, retaining ring, and connector. The trackball assembly connects directly to the system board and is secured by one screw. It cannot be replaced with the optical trackball used in the Models 420 and 430. The mechanical trackball and optical trackball are not interchangeable. o System board -- The system board is mounted directly to the system chassis. All removable components connected to the system board, except for the PC Card rails, must be removed prior to removing the system board. The system board is unique and cannot be replaced by the one used in the Models 420 and 430. o Processor upgrade -- Systems that come with the DX2/40 MHz processor can be upgraded to the DX2/50 MHz processor. Place the upgrade processor into the two connectors on the system board (Refer to "Removal and Replacement Procedures, Section 3.11). Once installed, the processor overrides control of the system board processor. The system board processor is not removable. o Real-Time Clock Battery -- This battery is located directly behind the Trackball. o PC Card rails -- The PC Card rails are replaceable and are secured by two screws from the bottom of the system board and a clip on top of the rails. The rails are not interchangeable with those used in Models 420 and 430. The clip is common between all models. The header attaches directly to the system board and cannot be removed. The top and bottom