Firstly, as ame has said:
Next, try turning on your Raspberry Pi 4B without a microSSD or any other boot devices attached. Make sure it is plugged into a good HDMI cable connected to a monitor or TV. If there Raspberry Pi 4B is OK you should see a diagnostic screen.
https://www.raspberrypi.com/documentati ... iagnostics
This may give you some idea what the problem is.Also, have you carefully counted the LED flashes and checked the meaning, based on reading the fine manual?
https://www.raspberrypi.com/documentati ... lash-codes
Next, try turning on your Raspberry Pi 4B without a microSSD or any other boot devices attached. Make sure it is plugged into a good HDMI cable connected to a monitor or TV. If there Raspberry Pi 4B is OK you should see a diagnostic screen.
https://www.raspberrypi.com/documentati ... iagnostics
Last, but not least. What voltage is the TTL on your TTL to USB adapter. Most of these are 5V, but the Raspberry Pi uses 3V3. Hopefully that hasn't caused any damage....
I tried SSHing into it, using a TTL to USB adapter
...
Statistics: Posted by AndyD — Tue Jan 14, 2025 7:35 am
