[PN53/PN53-B] Power LED pattern
The power indicator LED on the PN53/PN53-B models has two colors: white and amber.
Under normal startup conditions, the LED lights function as follows:
- After pressing the power button, the LED first lights up white, then turns amber, and finally, after entering the OS, it turns white and remains white.
If the device fails to start, the LED will display one of the following conditions:
After pressing the power button, the indicator light remains white.
- If the indicator remains white, it indicates a failure in the sequence process.
During the startup process, the indicator light flashes amber repeatedly.
- CPU Issue: Amber flashes twice, pauses, then flashes twice again, and repeats.
- DRAM Issue: Amber flashes three times, pauses, then flashes three times again, and repeats.
- Display Issue: Amber flashes four times, pauses, then flashes four times again, and repeats.
- Boot Device Issue: Amber flashes continuously without any pauses.
If you encounter any of the above issues, please check for any loose connections with the respective components or contact ASUS support.
