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Table 8-2 Diagnostic front panel LEDs and audible codes (continued)
Activity | Beeps | Possible Cause | Recommended Action | |
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Red Power LED flashes four | 4 | Power failure (power | 1. | Open the hood and ensure the 4 or |
times, once every second, |
| supply is overloaded). |
| power supply cable is seated into the |
followed by a two second |
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| connector on the system board. |
pause. Beeps stop after fifth |
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| 2. | Check if a device is causing the problem by |
iteration but LEDs continue |
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until problem is solved. |
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| removing ALL attached devices. Power on |
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| the system. If the system enters the POST, |
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| then power off and replace one device at a |
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| time and repeat this procedure until failure |
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| occurs. Replace the device that is causing |
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| the failure. Continue adding devices one at |
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| a time to ensure all devices are functioning |
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| properly. |
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| 3. | Replace the power supply. |
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| 4. | Replace the system board. |
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Red Power LED flashes five | 5 | CAUTION: To avoid damage to the DIMMs or | ||
times, once every second, |
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| the system board, you must unplug the computer | |
followed by a two second |
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| power cord before attempting to reseat, install, or | |
pause. Beeps stop after fifth |
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| remove a DIMM module. | |
iteration but LEDs continue |
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| 1. | Reseat DIMMs. |
until problem is solved. |
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| 2. | Replace DIMMs one at a time to isolate the |
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| faulty module. |
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| 3. | Replace |
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| memory. |
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| 4. | Replace the system board. |
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Red Power LED flashes six | 6 | For systems with a graphics card: | ||
times, once every second, |
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| 1. | Reseat the graphics card. |
followed by a two second |
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pause. Beeps stop after fifth |
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| 2. | Replace the graphics card. |
iteration but LEDs continue |
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until problem is solved. |
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| 3. | Replace the system board. |
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| For systems with integrated graphics, replace | |
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| the system board. | |
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Red Power LED flashes | 7 | System board failure | Replace the system board. | |
seven times, once every |
| (ROM detected failure |
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second, followed by a two |
| prior to video). |
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second pause. Beeps stop |
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after fifth iteration but LEDs |
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continue until problem is |
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solved. |
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Red Power LED flashes eight | 8 | Invalid ROM based on | 1. | Reflash the system ROM with the latest |
times, once every second, |
| bad checksum. |
| BIOS image. See the “Boot Block |
followed by a two second |
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| Emergency Recovery Mode” section of the |
pause. Beeps stop after fifth |
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| Desktop Management Guide for more |
iteration but LEDs continue |
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| information. |
until problem is solved. |
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| 2. | Replace the system board. |
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