happy new year, hope everyone is healthy!
After 2 days and one night of trying to fix it on my own I am here now...
Because I got a serious problem with my apollo batch 2 and hope you can help me

my unit is not booting anymore.
also ssh into is not working anymore.
sometimes I am fast enough when the putty connection window opens to type in the apollos login, but when it comes to the ssh password it gives me back a 'software caused a connection or network error'.
the unit shows periodically 4 times an orange light blinking an then fan comes on very slow and then nothing again.
after around 20 seconds again 4 times orange light blinking, little fan activity and so on... it feels to me like kind of caught in a boot-loop?
I already tried re-flashing 4 different 32 GB SD cards (2 of them were fresh out of amazon package, new) with same result, the unit is not booting.The original SD card that came with the unit also not working. For PSU I am using the futurebit original that came with the full package. Flashing an old image also not working, same problem.
it all started when I was using the new fullnode image that suddenly gave me a solid red light. it was the last time I was able to see the futurebit dashboard!
how can I fix my apollo? is there a workaround to connect the unit by usb or ethernet cable to a pc and somehow become it responsive again to reflash it? Rebooting router, using different cables, all was done and nothing helped.
Been reading through every single page of this thread and what I found were dozens of comments with just 'reflash your SD card'.
well, that solved it for pretty much the most of you but unfortunately not for me...
I would be more than happy to see my unit mining again. Seriously no more need for the node functionality, because this started all my problems!
Thanks for your help
Do you still have the full node drive plugged in? Make sure you remove it to be sure thats not causing the issue. That loop also sounds like it cant detect the hashboard. Make sure the controller is properly seated in its socket on the backside.