| IBM BIOS | The Basic Input/Output System, often known as the system BIOS or ROM BIOS, is a de facto standard for specifying a firmware interface in IBM PC compatible computers. The term comes from the CP/M operating system's Basic Input Output System, which was introduced in 1975. |
| IBM Personal Computer | The IBM Personal Computer (model 5150, also known as the IBM PC) is the first microcomputer in the IBM PC model range and the de facto standard for IBM PC compatibles. |
| IBM Personal Computer Engineers and Designers | It was designed by a team of engineers and designers led by Don Estridge in Boca Raton, Florida. |
| 1-1-3 CMOS read/write error | Perform diagnostics on:
- Run Set Up
- System Board |
| 1-1-4 ROM BIOS check error | Perform diagnostics on:
- System board |
| 1-2-X DMA Error | Perform diagnostics on:
- System board |
| 1-3-X | Perform diagnostics on:
- Memory Module |
| 1-4-4 | Perform diagnostics on:
- Keyboard |
| 1-4-X Error detected in first 64 kb of RAM | Perform diagnostics on:
- Memory Module
- System Board |
| 2-1-1, 2-1-2 | Perform diagnostics on:
- Run Setup |
| 2-2-2 | Perform diagnostics on:
1. Video Adapter (if installed) |
| 3-2-4 Keyboard controller failed | Perform diagnostics on:
- Keyboard |
| 3-3-4 Screen initialization failed | Perform diagnostics on:
- Video Adapter (if installed)
- System Board
- Display |
| 1 long, 2 short beeps | Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information, it is a Video (Mono/CGA (color graphics adapter) display circuitry) issue. |
| 1 long, 3 short beeps | graphics-related error or it is a Video (EGA (enhanced graphic adapter) ) display circuitry. |
| 3 long beeps | It ndicates your Keyboard or keyboard card has an error. |
| 1 beep, blank or incorrect display | Video display circuitry |
