Beep Codes and Error Messages 3-1Chapter 3Beep Codes and Error MessagesThis chapter lists beep codes and system error messages that can occur duringsystem start-up or, in the case of some failures, during normal system operation.The tables in this chapter list faults that can cause a beep code or system errormessage to occur.If a faulty system does not emit beep codes or display system error messages toindicate a failure, you should use the CD-based diagnostics to run the appropri-ate tests to help isolate the source of the problem. See “Running the SystemDiagnostics” in Chapter 2.POST Beep CodesIf the monitor cannot display error messages during the POST, the system mayemit a series of beeps that identifies the problem or that can help you identify afaulty component or assembly. Table 3-1 lists the beep codes that may be gener-ated during the POST. Most beep codes indicate a fatal error that prevents thesystem from completing the boot routine until the indicated condition iscorrected.When the system emits a beep code, record the code and find it inTable 3-1. If the table does not lead to the source of the problem, run the appro-priate tests in the CD-based diagnostics to assist in troubleshooting the problem.Table 3-1. Beep CodesBeep Code Error1 Refresh failure2 Parity cannot be reset3 First 64 KB memory failure4 Timer not operational5 Microprocessor failure6 8042 Gate A20 is off (v_mode)7 Exception interrupt error8 Display memory read/write error9 ROM checksum error
