POST Error Messages
POST Diagnostic Front Panel LEDs and Audible Codes
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This section covers the front panel LED codes as well as the audible codes that may occur before or during POST that do not necessarily have an error code or text message associated with them.
If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the computer and refer to the following table to determine the front panel LED codes.
Recommended actions in the following table are listed in the order in which they should be performed.
Beeps will occur only for 5 iterations and then stop. LEDs will continue to blink until corrective action is taken.
| Activity | Beeps | Possible Cause | Recommended Action |
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Green Power LED | None | Computer on. | None |
On. |
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Green Power LED | None | Computer in | None required. Press any key or move the |
flashes every two |
| Suspend to RAM | mouse to wake the computer. |
seconds. |
| mode (some |
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| models only) or |
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| normal Suspend |
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| mode. |
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Red Power LED | 2 | Processor thermal | Ensure that the computer air vents are not |
flashes two times, |
| protection | blocked and the processor cooling fan is |
once every |
| activated: | running. |
second, followed |
| A fan may be | Open hood, press power button, and see |
by a two second |
| blocked or not | if the processor fan spins. If the processor |
pause. |
| turning. | fan is not spinning, make sure the fan's |
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| OR | cable is plugged onto the system board |
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| The heatsink/fan | header. Ensure the fan is fully/properly |
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| seated or installed. | |
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| assembly is not | |
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| If fan is plugged in and seated properly, | |
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| properly attached | |
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| to the processor. | but is not spinning, then replace processor |
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| fan. |
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| Reseat processor heatsink and verify that |
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| the fan assembly is properly attached. |
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| Contact an authorized reseller or service |
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| provider. |
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Red Power LED | 3 | Processor not | Check to see that the processor is present. |
flashes three times, |
| installed (not an | Reseat the processor. |
once every |
| indicator of bad |
|
second, followed |
| processor). |
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by a two second |
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pause. |
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Service Reference Guide, dc7600 |