Waiting for the delivery of the USB-to-TTL converter. My old USB-serial adapter didn' t work.

Can you post logs of both working and not working boards? If they are exactly the same software, it sounds like a hardware issue. If the HardKernel images works as expected, perhaps you've updated all 3, but not rebooted the working one yet?

@tiobily Is your a7z factory 8GB or modded out of curiosity (lpddr4 or lpddr5) ? Are you able to connect serial console onto uart0 (pb9, pb10) header pins (3.3V TTL uart adapter) and see right after power is applied to the board the debug of dram detection and training? Debug will show if full 8GB is being detected - once this is confirmed, we can take it from there.

@ioncube Were you able to use VPU with Jellyfin?

If anybody needs a simple way to check text on the web or extract text from online PDFs on low‑spec SBCs, here is surf.py. It’s a tiny Python‑based terminal browser designed for boards like Orange Pi Zero, so you’re not completely blind internet‑wise even without a full browser. Starts with: ./surf.py domain.com Dependencies outside standard library: requests, PyPDF2. surf.py