Table 10-2 Diagnostic front panel LEDs and audible codes (continued)
Activity | Beeps | Possible Cause | Recommended Action | |
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Red Power LED flashes two | 2 | Processor thermal | 1. | Ensure that the computer air vents are not |
times, once every second, |
| protection activated: |
| blocked and the processor cooling fan is |
followed by a two second pause. |
| A fan may be blocked or not |
| running. |
Beeps stop after fifth iteration |
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| |
| turning. | 2. | Open hood, press power button, and see if the | |
but LEDs continue until problem |
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| processor fan spins. If the processor fan is not | |
is solved. |
| OR |
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| spinning, make sure the fan's cable is plugged | ||
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| The heat sink/fan assembly |
| onto the system board header. |
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| is not properly attached to | 3. | If fan is plugged in, but is not spinning, then |
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| the processor. | ||
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| replace heat sink/fan assembly. | |
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| 4. | Contact an authorized reseller or service |
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| provider. |
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Red Power LED flashes three | 3 | Processor not installed (not | 1. | Check to see that the processor is present. |
times, once every second, |
| an indicator of bad | 2. | Reseat the processor. |
followed by a two second pause. |
| processor). | ||
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Beeps stop after fifth iteration |
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but LEDs continue until problem |
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is solved. |
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Red Power LED flashes four | 4 | Power failure (power supply | 1. | Open the hood and ensure the 4 or |
times, once every second, |
| is overloaded). |
| power supply cable is seated into the |
followed by a two second pause. |
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| connector on the system board. |
Beeps stop after fifth iteration |
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| 2. | Check if a device is causing the problem by |
but LEDs continue until problem |
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| removing ALL attached devices. Power on the | |
is solved. |
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| system. If the system enters the POST, then | |
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| power off and replace one device at a time and |
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| repeat this procedure until failure occurs. |
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| Replace the device that is causing the failure. |
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| Continue adding devices one at a time to |
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| ensure all devices are functioning 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 the | ||
times, once every second, |
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| system board, you must unplug the computer power | |
followed by a two second pause. |
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| cord before attempting to reseat, install, or remove | |
Beeps stop after fifth iteration |
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| a DIMM module. | |
but LEDs continue until problem |
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| 1. | Reseat DIMMs. |
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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| 4. | Replace the system board. |
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Red Power LED flashes six times, | 6 | For systems with a graphics card: | ||
once every second, followed by |
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| 1. | Reseat the graphics card. |
a two second pause. Beeps stop |
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after fifth iteration but LEDs |
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| 2. | Replace the graphics card. |
continue until problem is solved. |
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| 3. | Replace the system board. |
For systems with integrated graphics, replace the system board.