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Raspberry Pi Troubleshooting

Updated over 3 weeks ago

Introduction

Raspberry Pi is a small, versatile single-board computer commonly used for DIY projects, IoT, edge computing, and network monitoring. While highly reliable, it can encounter hardware or network connectivity issues. This guide outlines essential troubleshooting steps to help identify and resolve common problems with Raspberry Pi devices.

1. Basic Checks

Check Physical Connections and LED Indicators

  • Make sure the power cable and Ethernet are properly connected.

  • Inspect the LED indicators on the Raspberry Pi board.

Verify Raspberry Pi LED Status

LED

State

Description

PWR (Red)

Solid Red

Power is being supplied correctly.

Off / Flickering

Power issue – check power supply and cable.

ACT (Green)

Blinking

SD card is being read – system is booting.

Off

System is idle, or no valid boot detected.

LNK (if Ethernet)

Blinking Green

Ethernet link is up and there is traffic.

Off

No network detected or Ethernet not connected.

Note: LED behavior may vary slightly depending on the Pi model (e.g., Pi 3, Pi 4, Zero).


2. Reboot the Raspberry Pi and Related Devices

  • Disconnect the Raspberry Pi from power.

  • Wait 5–10 seconds, then reconnect the power supply.

  • If connected to a router, switch, or other network gear, restart those as well.

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