viii
System Troubleshooting 69
Hardware Diagnostic Procedure 69
System Check Procedures 70
Power System Check 70
System External Inspection 70
System Internal Inspection 70
Beep Codes 71
Checkpoints 72
BIOS Recovery 75
Jumper and Connector Information 76
M/B Placement 76
Jumper Setting 78
Setting Jumper 78
FRU (Field Replaceable Unit) List 85
Aspire X3990 Exploded Diagram 86
Aspire X3990 FRU List 88