IBM 704 manual Post Error Messages, Post Beep Codes

Overview of the Diagnostic Tools

IRQ/DMA assignments, memory usage, device drivers, and so on.

ŸUtility Programs

The Diagnostic Diskette also contains utility programs, such as an ASCII text editor and a diskette format program.

Error Messages

Error messages indicate that a problem exists; they are not intended to be used to identify a failing part. Troubleshooting and servicing of complex problems indicated by error messages should be performed by a trained service technician. Hardware error messages that appear on the screen can be text, numeric, or both.

Messages generated by your software—the operating system or application programs—generally are text messages, but they also can be numeric. Basically, there are four types of error messages. These include POST error messages, diagnostic error messages, POST beep codes, and software-generated messages.

POST Error Messages

POST error messages appear when, during startup, POST finds problems with the hardware or detects a change in the hardware configuration. A list of these error messages is given in “POST Error Message Table” on page 232.

POST Beep Codes

POST beep codes are sounds emitted from the speaker, if POST finds a problem. One beep indicates the POST completed successfully. If the server halts while running POST, one or more beeps indicate that a problem was found by the POST. A list of the beep error codes is given in “Beep Codes” on page 244.

Chapter 5. Solving Problems 217