troubleshooting (continued) cooling fans, 99 damaged system, 97 diskette drive, 101 expansion card, 108 external connections, 96 hard drive, 104

hard drives (SATA), 105 keyboard, 93 memory, 100 microprocessor, 109 mouse, 93

NIC, 95

power supplies, 98

SAS RAID controller daughter card, 107

serial I/O device, 94 start-up routine, 91 system cooling, 99 tape drive, 103 USB device, 95 video, 92

wet system, 96

U

upgrades processor, 78

USB device troubleshooting, 95

using system setup, 29

V

video troubleshooting, 92

W

warning messages, 28

warranty, 9

wet system troubleshooting, 96

158

Index

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Dell 840 manual Upgrades processor