8-6 Troubleshooting Speaker volume is too low.Adjust the volume control on the speaker. If the volume is still too low,adjust the volume through the system software. See the WindowsMultimedia online help. Sound is only coming from one speaker.Balance the speaker output by adjusting the balance in the soundsoftware. See the Windows Multimedia online help.DiagnosticsOne beep indicates that the system has completed its POST test. If intermittentbeeping occurs, power off the system and try again. If the beeping persists, seethe following table. The table summarizes problems that may develop duringsystem operation and lists (in sequential order) suggested corrective actions.Problems and SolutionsProblem Symptom SolutionNo power Power lamp on computer statuspanel does not light.1. Check that the power cord is pluggedinto the power socket on the computer.Check that the other end of the cord isplugged into a live, properly grounded ACpower outlet.2. Check cable connections between thepower supply and riser board and betweenthe riser board and power switch.3. Systematically eliminate possibleshorted PCBs by removing cables andexpansion boards.4. Check the +5 and +12 power supplyvoltages (see Section 4 “System Board”).Measure voltages with the system boardinstalled.5. Replace the power switch assembly.6. Replace the power supply.7. Replace the system board.Power supplymalfunctionAny of the following conditionscould occur:Front panel lamps out, disketteand/or hard drives do not spin,monitor blank, interface ports notworking, and keyboard lamp outand/or cannot input from keyboard.1. Perform steps 1 through 4 listed in thistable under No Power.2. Check power supply voltages. Voltagesshould be measured with a load on them(system board plugged in). See Section 4for connector pin assignments and Section10 for power supply specifications.3. Replace the power supply.
