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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 |
| A fan may be blocked or |
| running. |
pause. Beeps stop after fifth |
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| |
| not turning. | 2. | Open hood, press power button, and see if | |
iteration but LEDs continue until |
| |||
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| the processor fan spins. If the processor fan | |
problem is solved. |
| OR |
| |
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| is not spinning, make sure the fan's cable is | ||
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| ||
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| |
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| The heat sink/fan |
| plugged onto the system board header. |
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| |
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| assembly is not properly | 3. | If fan is plugged in, but is not spinning, then |
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| attached to the processor. | ||
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| replace heat sink/fan assembly. | |
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4. Contact an authorized reseller or service provider.
Red Power LED flashes three | 3 |
times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved.
Processor not installed (not 1. | Check to see that the processor is present. | ||
an indicator of bad | 2. | Reseat the processor. | |
processor). | |||
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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 until |
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| ||
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| removing ALL attached devices (such as hard | |
problem is solved. |
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| |
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| or optical drives and expansion cards). | |
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| Power on the system. If the system enters the |
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| POST, then power off and replace one |
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| device at a time and repeat this procedure |
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| until failure occurs. Replace the device that is |
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| causing the failure. Continue adding devices |
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| one at a time to ensure all devices are |
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| functioning properly. |
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| 3. Replace the power supply. | |
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| 4. | Replace the system board. |
Red Power LED flashes five | 5 |
times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved.
CAUTION: To avoid damage to the DIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a DIMM module.
1.Reseat DIMMs.
2.Replace DIMMs one at a time to isolate the faulty module.
3.Replace
4.Replace the system board.