Digital Equipment STARION 20 Series, Service Maintenance Manual

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Troubleshooting Digital STARION 9xx & 20xx PC
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Beep Codes
When POST finds an error and cannot display a message, the computer's speaker emits a series of beeps to
indicate the error. For example, video failure or configuration error is indicated by a 1 - 2 beep code (a
burst of three beeps , one long beep followed by two short beeps ).
The following table lists other fatal error and their associated beep codes.
Each code represents the number of short beeps that are grouped together.
Fatal errors (errors that lock up the computer) are generally the result of a failed main logic board or some
other add-on component (SIMM, BIOS, computer battery, etc.).
Beep Code Error Message
2-2-3 BIOS ROM checksum
3-1-1 Test DRAM refresh
3-1-3 Test keyboard controller
3-4-1 Test 512K base address lines
3-4-3 Test 512K base memory
2-1-2-3
Check ROM copyright notice
2-2-3-1 Test for unexpected interrupts