the possible types of beep codes are:
no beeps
no beep codes indicates that your computer successfully completed post without finding any errors.
continuous beep
your startup (boot) microprocessor has failed, or your system board or speaker subsystem might contain a failing component. if the system continues through post with no errors, call for service. if no video appears, the startup processor has failed.
beep codes for specific failures
beep codes indicating specific system problems are listed in the following table.
table 3. post beep codes

table 3. post beep codes (continued)