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Good day, 
 
I am experiencing the following issue and hope for some assistance. 
I am trying to get an OS running on my Orange Pi 3 Zero 4GB, but none of the images seem to work. I have now tried almost all available options and flashed them using both Win32DiskImager and Balena Etcher. 
 
Hardware: 
- Orange Pi 3 Zero 4GB (passively cooled)
 - Raspberry Pi 27W power supply (also tested with other fast-charging adapters)
 
 
  
SD Cards Used: 
- Sandisk Ultra 32, 64 GB SXC I Class 10
 - Intenso: 8 GB
 - 32 GB Pro Plus Smart Card: Class 10
 
 
  
Images Used: 
- Opios-arch-aarch64-xfce-opizero3-24.07-linux6.1.31.img
 - Orangepizero3_1.0.6_ubuntu_noble_desktop_xfce_linux6.1.31.img
 - Orangepizero3_1.0.6_ubuntu_noble_server_linux6.1.31.img
 - Orangepizero3_1.0.4_debian_bullseye_desktop_xfce_linux6.1.31.img
 - debian-trixie-arm64-reu7ca.img
 - ubuntu-noble-arm64-zoze7f.img
 
 
  
Behavior without an SD card or with a non-functional image: 
- Screen powers on, prompt appears, no boot medium detected...
 
 
  
Behavior with an image, e.g., Opios-arch-aarch64-xfce-opizero3-24.07-linux6.1.31.img: 
- Monitor powers on, screen remains black, green LED blinks continuously in a relatively fast double-flash pattern.
 
 
  
What does the double-blinking green LED indicate? I can only find explanations for triple blinks online. 
Could it be that the Orange Pi is defective, and should I consider returning it? Or is there something I may have overlooked? 
I also have two Raspberry Pi 5 (8GB) devices that work without any issues using the same SD cards. 
 
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