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NOTE: Write down your current boot sequence in case you want to restore it. 3. Press the up- and down-arrow keys to move through the list of devices. 4. Press the spacebar to enable or disable a device (enabled devices have a check mark). 5. Press plus (+) or minus (–) to move a selected device up or down the list. Clearing Forgotten Passwords CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. 1. Follow the procedures in Before You Begin. 2. Locate the 3-pin password jumper (PSWD) on the system board and attach the jumper plug to pins 2 and 3 to clear the password. NOTE: When you receive your computer, the jumper plug is attached to pins 1 and 2. 3. Close the computer cover. 4. Connect your computer and monitor to electrical outlets, and turn them on. 5. After the Microsoft Windows desktop appears on your computer, shut down the computer. 6. Turn off the monitor and disconnect it from the electrical outlet. 7. Disconnect the computer power cable from the electrical outlet, and press the power button to ground the system board. 8. Open the computer cover. 9. Locate the 3-pin password jumper on the system board and attach the jumper to pins 1 and 2 to re- enable the password feature. 10. Replace the computer cover. NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer. Connect your computer and devices to electrical outlets, and turn them on. Back to Contents Page Back to Contents Page Removing and Installing Parts Dell™ Dimension™ 1100/B110 Systems Service Manual Memory Cards Front Panel Drives Hard Drive Floppy Drive CD/DVD Drive Processor Fan Assembly System Board Power Supply Battery Memory You can increase your computer memory by installing memory modules on the system board. For information on the type of memory supported by your computer, see Technical Specifications. NOTE: DDR 333 memory operates at 320 MHz when used with an 800-MHz front-side bus. DDR Memory Overview DDR memory modules should be installed in pairs of matched memory size. This means that if you purchased your computer with 128 MB of memory installed and you want to add another 128 MB of memory, you should install it in the appropriate connector. If the DDR memory modules are not installed in matched pairs, the computer will continue to operate, but with a slight reduction in performance. NOTE: Always install DDR memory modules in the order indicated on the system board. NOTE: Your computer has two memory slots labeled DIMM3 and DIMM4. The recommended memory configurations are: Install a pair of matched memory modules in connectors DIMM3 and DIMM4. Do not install ECC memory modules. If you install a mixed pair PC2700 (DDR 333-MHz) and PC3200 (DDR 400-MHz) memory, the modules function at the slowest speed installed. Be sure to install a single memory module in DIMM3 or the connector closest to the processor before you install modules in the other connector. Memory Installation Guidelines NOTICE: If you remove your original memory modules from the computer during a memory upgrade, keep them separate from any new modules that you may have, even if you purchased the new modules from Dell. You should install your new memory modules in connectors DIMM3 and DIMM4. If possible, do not pair an original memory module with a new memory module. Otherwise, your computer may not function at optimal performance. NOTE: Memory purchased from Dell is covered under your computer warranty. Installing Memory CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. 1. Shut down the computer through the Start menu 2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your computer, turn them off now. NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack. 3. Disconnect any telephone or telecommunication lines from the computer. 4. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover. 5. Remove the computer cover. 6. Lay the computer on its side so that the system board is on the bottom of the inside of the computer. 7. If necessary, remove a memory module: a. Press out the securing clip at each end of the memory module connector. b. Grasp the module and pull up. If the module is difficult to remove, gently ease the module back and forth to remove it from the connector. 8. To insert a module, press out the securing clip at each end of the memory module connector. 9. Align the notch on the bottom of the module with the crossbar in the connector. NOTICE: T...