Yesterday, my Raspberry Pi 3 didn't boot, and the problem was in the micro SD slot. If I just plug power, only the red LED lights up and stays solid. But if I also press on the card, the Pi boots and all goes well. So, there was no contact with the SD card, as the cover didn't hold it good enough. As a hot fix, I used a little pin to stick it there, and it worked.
But the pin doesn't look good, so I decided to find out what's the cause of that. The problem, as I thought, was in one of soldering pads falling off the board (the one near the J9 label). So, I soldered it:
Okay, there is nothing good about my soldering, but there was nothing wrong touched (I still hope so...). But the Pi still didn't boot, with or without the pin.
After an hour of trying and retrying to get the Pi working, I ended up with this:
I'm sure I can still solder the cover back, but the Pi still doesn't boot, no matter how I try to press the SD card. I have that nasty solid red led and nothing else.
Can this be repaired?