4 Troubleshooting Your System . . . . . . . . 129

Safety First—For You and Your System

129

Troubleshooting System Startup Failure

129

Troubleshooting External Connections

129

Troubleshooting the Video Subsystem

130

Troubleshooting a USB Device

130

Troubleshooting a Serial I/O Device

131

Troubleshooting a NIC

131

Troubleshooting a Wet System

132

Troubleshooting a Damaged System

134

Troubleshooting the System Battery

134

Troubleshooting Power Supplies

135

Troubleshooting System Cooling Problems

136

Troubleshooting a Fan

136

Troubleshooting System Memory

137

Troubleshooting a Hard Drive

139

Troubleshooting an Internal Hard Drive

140

Troubleshooting a Storage Controller

141

Troubleshooting Expansion Cards

142

Troubleshooting Processors

144

8

Contents

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Dell DL2200 owner manual Troubleshooting Your System, 136