Troubleshooting • Raspberry Pi 5 - HDMI not working properly when Ethernet cable is connected

Hi all,

I just got a new Raspberry Pi 5 with 8GB RAM. When I connect a monitor in HDMI 0 and the Ethernet cable at the same time, the monitor starts to go on and off intermittently. If I disconnect the Ethernet cable, the monitor works perfectly fine.

I created two different images for my Pi, both using the official Imager application:
- Raspberry Pi OS 64-bit - 2024-03-15
- Home Assistant OS 12.4 (RPi5) - 2024-06-18

The issue happens in both images, so it is not related to installation.

My setup:
- Raspberry Pi 5 8GB
- Official case with built-in fan
- Dell 23" monitor
- Bluetooth keyboard and mouse (connected directly, no USB dongle)

I'm using the official 27W USB-C power supply, which should provide enough power for the Pi to work with all peripherals. However, I noticed that if I connect a power supply with higher wattage (like a laptop dock or charger), the issue goes away. Apparently, the Pi is requiring more than 27W to support this setup.

Any ideas? Could it be a hardware defect in the Pi or in the power supply? Any tests I can run to identify the power consumption?


Thanks,

Antonio

Statistics: Posted by acoelho74 — Thu Jun 27, 2024 1:42 am — Replies 2 — Views 35

---