7-4 Dell PowerEdge 6100/200 System Installation and Troubleshooting GuideRemoving the Front BezelUse the following procedure to remove the front bezel:1. Remove the computer covers.See the previous subsection, “Removing the Com-puter Covers.”2. Release the two tabs on each side of the bezel (seeFigure 7-3).3. Slide the front bezel straight away from thechassis.Figure 7-3. Removing the Front BezelInside the ChassisIn Figures 7-4 and 7-5, the computer cover is removed toprovide interior views from the left and right sides. Theseillustrations also identify features on the front and backof the computer. Refer to them to locate interior featuresand components discussed later in this guide.When you look inside the computer, note the direct current(DC) power cables leading from the power-supply parallel-ing board. These cables supply power to the systemboard, small computer system interface (SCSI) backplaneboard, externally accessible drives, and certain expansioncards that connect to external peripherals.The flat ribbon cables are the interface cables for internaldrives. For SCSI devices, the interface cable connectsexternally accessible SCSI devices and the SCSI back-plane board to a SCSI host adapter either on the systemboard or on an expansion card.The system board—the large, vertical printed circuit boardat the left side of the chassis near the back—holds thecomputer’s control circuitry and other electronic compo-nents. Some hardware options are installed directly ontothe system board. The system board provides 10 expan-sion-card connectors. The external drive bays provide spacefor up to four half-height drives, typically diskette drives,CD-ROM drives, or tape drives. The internal drive baysprovide space for up to six half-height SCSI hard-diskdrives. These drives are connected to the SCSI hostadapter via the SCSI backplane board, which manages thedrive bays and monitors the drive environment, includingvoltages and temperatures.During an installation or troubleshooting procedure, youmay be required to change a jumper or switch setting on thesystem board, the microprocessor module, an expansioncard, or a drive. For more information on the jumpers andswitches, see Appendix C, “Jumpers, Switches, andConnectors.”tabs (4)WARNING: Before a trained service technicianaccesses the inside of the computer, any and allpower supplies must be disconnected from theirpower source, and the cables to the power suppliesmust also be disconnected. If this computer hasmore than one power supply, disconnect bothpower supply cords before servicing to avoidelectrical shock.
