Installing System Components 147Installing the RAID Battery1 Insert the RAID battery into the battery carrier until it locks into place.See Figure 3-29.2 Connect the cable to the battery. See Figure 6-1.3 Close the system. See "Closing the System" on page 89.4 Turn on the system and attached peripherals.Control Panel Assembly—LED (Optional)Removing the Control Panel Assembly (Four–Hard-Drive System)CAUTION: Many repairs may only be done by a certified service technician.You should only perform troubleshooting and simple repairs as authorized inyour product documentation, or as directed by the online or telephone serviceand support team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that camewith the product.1 If installed, remove the front bezel. See "Removing the Front Bezel" onpage 86.2 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet and peripherals.3 Open the system. See "Opening the System" on page 87.4 Press the metal tabs at the end of the control panel cable and disconnectthe cable at back of the control panel board. See Figure 3-30.5 Disconnect the USB cable at back of the control panel board.See Figure 3-30.CAUTION: Do not pull on the cable to unseat the connector. Doing so candamage the cable.6 Remove the two screws that secure the control panel board to the systemchassis and remove the board.