This is my first raspberry pi and I've been trying for 4 hours to get it to turn on and I'm starting to think it's defective. I can't find anyone in the internet having the exact same problem as me. I don't want to have to return it and wait for a new one, I was excited to spend the weekend playing with it, but I'm worried I might have to. I'm bummed this is how it's turned out so far.
It will show the bootloader just fine so HDMI works, I tried 2 different SD cards (one was included and preloaded with noobs, but that wouldn't boot either, just flashing screen), I tried 2 different power cables, I tried 4 different OS versions using the raspberry pi imager to write them onto the SD card.
I've tried booting from both the USB port and the SD card reader, so that rules out broken SD card slot.
ACT light blinks, but not in a steady pattern apparently as its supposed to. I did have a separate 7" monitor, was wondering if that was the issue, so connected it to one of my desktop monitors, which didn't receive any signal at all. I've tried everything over the last 4 hours and cannot find a solution. Apparently no one on the internet has had exactly this issue. None of the fixes for similar issues, like black screen are working for me either.
I tried the recovery option on the imager, and it showed the green square as expected. Still, no successful boot to an OS. I don't know what else to do. I'm pretty sure it's dead.