2 Troubleshooting Procedures
Code Beeps POST Routine Description
AAh | Scan for F2 key stroke |
ACh | Enter SETUP |
AEh | Clear Boot flag |
B0h | Check for errors |
B2h | POST done - prepare to boot operating system |
B4h 1 | One short beep before boot |
B5h | Terminate QuietBoot (optional) |
B6h | Check password (optional) |
B9h | Prepare Boot |
Bah | Initialize DMI parameters |
BBh | Initialize PnP Option ROMs |
BCh | Clear parity checkers |
BDh | Display MultiBoot menu |
BEh | Clear screen (optional) |
BFh | Check virus and backup reminders |
C0h | Try to boot with INT 19 |
C1h | Initialize POST Error Manager (PEM) |
C2h | Initialize error logging |
C3h | Initialize error display function |
C4h | Initialize system error handler |
C5h | PnPnd dual CMOS (optional) |
C6h | Initialize notebook docking (optional) |
C7h | Initialize notebook docking late |
C8h | Force check (optional) |
C9h | Extended checksum (optional) |
D2h | Unknown interrupt |
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