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| Beeps | Description |
|---|---|
| 1-2-X | ° One beep |
| ° A pause (or break) | |
| ° Two beeps | |
| ° A pause (or break) | |
| ° Any number of beeps | |
| 4 | Four beeps |
| Beep/Symptom | FRU / Action |
| 1-1-2 | 1. Optional Microprocessor |
| (Microprocessor register test failed) | (if installed) |
| 2. Microprocessor | |
| 1-1-3 | 1. Real-Time Clock or Battery |
| (CMOS write/read test failed) | 2. System board |
| 1-1-4 | 1. System Board |
| (BIOS read only memory checksum | |
| failure) | |
| 1-2-1 | 1. System board |
| (Programmable Interval Timer | 2. Microprocessor |
| test failure) | |
| 1-2-2 | 1. System board |
| (DMA initialization test in | 2. Microprocessor |
| progress or failure) | |
| 1-2-3 | 1. System board |
| (DMA page register write/read | 2. Microprocessor |
| test in progress or failure) | |
| 1-2-4 | 1. System board |
| (RAM refresh verification failure) | 2. Microprocessor |
| 1-3-1 | 1. Dual Inline Memory Module (DIMM) |
| (1st 64K RAM test failed) | 2. Microprocessor |
| 1-3-2 | 1. Dual Inline Memory Module (DIMM) |
| (1st 64K RAM parity test failure) | 2. Microprocessor |
| 3. System Board | |
| 1-4-3 | 1. System Board |
| (Interrupt vector loading | 2. Microprocessor |
| test has failed) | |
| 2-1-1 | 1. System board |
| (Secondary DMA register test is | |
| in progress or has failed) | |
| 2-1-2 | 1. System board |
| (Primary DMA register test is | |
| in progress or has failed) | |
| 2-1-3 | 1. System board |
| (Primary interrupt mask register | |
| test has failed) | |
| 2-1-4 | 1. System board |
| (Secondary interrupt mask register | |
| test has failed) | |
| 2-2-2 | 1. System Board |
| (Keyboard controller test is | 2. Keyboard |
| in progress or has failed) | |
| 2-2-3 | 1. Battery |
| (CMOS power failure and | 2. System board |
| checksum checks are in progress) | |
| 2-3-2 | 1. Video Adapter |
| (Screen memory test is in | 2. System board |
| progress or has failed) | |
| 2-3-3 | 1. Video Adapter |
| (Screen retrace tests are in | 2. System board |
| progress or have failed) | |
| 3-1-1 | 1. System Board |
| (Timer tick interrupt test is in | |
| progress or have failed) | |
| 3-1-2 | 1. System Board |
| (Interval timer channel 2 test | |
| is in progress or has failed) | |
| 3-1-4 | 1. System Board |
| (Time-Of-Day clock test is in | |
| progress or has failed) | |
| 3-2-4 | 1. Battery |
| (Comparing of CMOS memory | 2. System Board |
| size against actual is in progress) | |
| 3-3-1 | 1. Run Setup |
| (Memory size mismatch has occurred) | |
| One Short Beep | 1. N/A |
| (POST completed successfully or | |
| an incorrect password was entered) | |
| Two Short Beeps | 1. Run Diagnostics |
| (POST encountered an error) | |
| Three Short Beeps | 1. Dual Inline Memory Module |
| 2. Microprocessor | |
| 3. System Board | |
| One Continuous Beep | 1. Optional Microprocessor |
| (if installed) | |
| 2. Microprocessor | |
| 3. System Board | |
| Repeating Short Beeps | 1. Keyboard |
| 2. System Board | |
| One Long and One Short Beep | 1. Video adapter (if present) |
| 2. System Board | |
| One Long and Two Short Beeps | 1. Video adapter (if present) |
| 2. System Board | |
| One Long and Three Short Beeps | 1. Verify monitor connections |
| 2. Video Adapter (if present) | |
| 3. System Board | |
| Two Long and Two Short Beeps | 1. Video adapter |
| (Video adapter not supported) |
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.