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As the computer boots, it detects the additional memory and automatically updates the system configuration information.

Failure to do so may cause system damage. Pull the system board assembly away from you toward the front of the computer and slightly to the right; at the same time, use your left hand to release the audio connectors by pulling the side of the computer base slightly to the left. Replace the coin-cell battery see Replacing the Coin-Cell Battery.

Dell Precision m90 User Manual (Page 87 of )

Page of Go. Information in this document is subject to change without notice. Remove the M2 x preciision screw that attaches the modem to the system board. If your computer has a gray cable, connect it to the connector with the gray triangle, if one is available on your card.

Connect the modem cable to the modem. Replace the hinge cover see Replacing the Hinge Cover. If you ordered an internal card with Bluetooth wireless technology with your computer, the card is already installed.


Reconnect the LED board connector to the system board. Replacing the Palm Rest 1. If you remove the hard drive from the computer when the drive is hot, do not touch the metal housing of the hard drive.

To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network device. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products.

Dell Precision M90 Service Manual

Disconnect the antenna cables from the Mini-Card, if applicable. The system board’s BIOS chip contains the Service Tag, which is also visible on a barcode label on the bottom of the computer. Repeat step 6 for the lower-left corner of the bezel. Reroute the display cable into the cable channel. Connect precison auxiliary antenna cable black to the antenna connector with the black triangle. Remove the processor see Removing the Processor Module.

To help prevent damage to the computer, perform the following steps before you begin working inside the computer.

Do not separate the thermal-cooling unit heat sink from the video card. Align the display assembly over the screw holes in the base of the computer.

You must position the processor module correctly in the ZIF socket to avoid permanent damage to the module and the socket.


Remove the two docking-frame screws. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins.

Dell Precision M90 Parts

If you do not feel the click, remove the module and reinstall it. Replace the keyboard see Keyboard. Otherwise, the hard drive may be damaged in transit. Repeat step 6 for the lower-left del, of the bezel. Disconnect the smart-card reader connector from the system board.

Pull up on the pull-tab to disconnect the modem from the connector on the system board. Align the Mini-Card with the connector at a degree angle, and press the Mini-Card down into the securing clips until the card clicks into place. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products.

When you replace the processor thermal-cooling assembly, be sure to place a new thermal pad on the part of the thermal-cooling assembly that covers the processor. Align the latch with the display panel and slide the latch to the left to secure it into place.