I have four Raspberry Pi 4, Model B SBC's (as well as a Raspberry Pi 400) all of which are presenting with the same issue.
All of the units worked when I put them away in 2024 but no longer connect to either of my monitors now that I have time to work with them again. I've checked both monitors by connecting them to my desktop machine, and both function properly under both Windows 10 and Rocky Linux. When connected to any of my five Raspberry Pi 4 series computers, the screen shows no cable connected, I've tried several cable sets including two with no adapters, and three additional with various adapter combinations. They worked originally with these cables but no longer do.
I appear to be fighting two issues in that I can't see the RIP directly because the hdmi ports don't connect and secondly, none of these same PIs will read Pi OS Trixie (64) full install form the micro-SD card.
I'm running out of ideas.
All of the units worked when I put them away in 2024 but no longer connect to either of my monitors now that I have time to work with them again. I've checked both monitors by connecting them to my desktop machine, and both function properly under both Windows 10 and Rocky Linux. When connected to any of my five Raspberry Pi 4 series computers, the screen shows no cable connected, I've tried several cable sets including two with no adapters, and three additional with various adapter combinations. They worked originally with these cables but no longer do.
I appear to be fighting two issues in that I can't see the RIP directly because the hdmi ports don't connect and secondly, none of these same PIs will read Pi OS Trixie (64) full install form the micro-SD card.
I'm running out of ideas.
Statistics: Posted by A0Endress — Mon Feb 09, 2026 10:10 pm