Acer 721TX Service Guide - Page 99

Symptom / Error 02D0 System cache error - Cache disabled 02F0 CPU ID: 02F5 DMA Test Failed 02F6 Software NMI Failed 02F7 Fail-Safe Timer NMI Failed Device Address Conflict Allocation Error for: device Failing Bits: nnnn Fixed Disk n Invalid System Configuration Data I/O device IRQ conflict Operating system not found FRU / Action in Sequence 1. IMM (CPU board) 2. System board 1. IMM (CPU board) 2. System board 1. DIMM 2. IMM (CPU board) 3. System board 1. DIMM 2. IMM (CPU board) 3. System board 1. DIMM 2. IMM (CPU board) 3. System board 1. Run "Load Setup Defaults" in BIOS Setup Utility. 2. Backup battery (RTC) 3. System board 1. Run "Load Setup Defaults" in BIOS Setup Utility. 2. Backup battery (RTC) 3. System board 1. DIMM 2. BIOS ROM 3. System board None 1. BIOS ROM 2. System board 1. Run "Load Setup Defaults" in BIOS Setup Utility. 2. Backup battery (RTC) 3. System board 1. Enter Setup and see if fixed disk and drive A: are properly identified. 2. Diskette Driver 3. Hard Disk 4. System board Chapter 4 91