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Light and beep pattern | Component tested | Error condition | Troubleshooting steps |
2.2 (blink) | BIOS | The main area (DXE) of BIOS has become corrupted, and there is no recovery binary image available. (Also happens when updating the BIOS.) | Perform BIOS recovery with external media (USB or CD-ROM). Go to HP Notebook PCs - Recovering the BIOS for additional information. |
2.3 (blink) | BIOS | The embedded controller policy requires the user to enter a key sequence. | Disconnect the power supply and power the computer with battery power. This resets the Embedded Controller/Keyboard Controller.
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2.4 (blink) | BIOS | The embedded controller is checking or recovering the boot block. | Disconnect the power supply and power the computer with battery power. This resets the Embedded Controller/Keyboard Controller.
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3.2 (blink) | Hardware | The embedded controller times out waiting for BIOS to return from memory initialization. | Reseat the memory. See the section Reseating memory modules in a notebook for more information. If reseating the memory does not resolve the problem, try replacing the memory modules. You might also consider contacting support for repair due to a possible RAM or system board failure. |
3.3 (blink/beep) | Hardware | The embedded controller times out waiting for BIOS to return from graphics initialization or if a graphics output device failed to initialize. | Contact support for repair due to graphics or video failure. |
3.4 (blink) | Hardware | The system board displays a power failure. | Check the power cable connections. Verify that any external power adapter has sufficient capacity for the system. |
3.5 (blink) | Hardware | The CPU is not detected. | Contact support for repair due to system board or CPU failure. |
4.2 (blink/beep) | Thermal | A CPU overheating condition detected.* | Allow the computer to cool down, then go to the section Removing dust from the cooling areas in a notebook. |
4.3 (blink/beep) | Thermal | An ambient temperature overheating condition detected. | If the error persists after cooling and cleaning the notebook, there might be heat-related damage to internal components. Contact support for repair. |
4.4 (blink/beep) | Thermal | A GPU (graphics processing unit) overheating condition detected. | |
5.2 (blink) | System board | The embedded controller cannot find valid firmware. | Disconnect the power supply and power the computer with battery power. This resets the Embedded Controller/Keyboard Controller.
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5.3 (blink) | System board | The embedded controller times out waiting for the BIOS. | Remove all accessory devices from the notebook. If the error code persists, contact support for possible repair. |
5.4 (blink/beep) | System board | The embedded controller times out waiting for the BIOS to return from system board initialization (end of POST). |