Yesterday when I tried to boot my Pi 3b+ like the usual, it's red LED lit up very faintly and it's green LED showed no activity, so I switched off the power supply and switched it back on again. This time it lit up and the (sense) hat on top of it lit up too but it got stuck like that. I know it didn't boot because I tried SSHing into it with no results. I tried burning Rasbian on a new (FAT32) microSD with ssh and wifi configs. This time the Pi's red light glowed brightly, the green light didn't and the hat flashed for a fraction of a second. It didn't boot. Could you please tell me what on earth happened to it all of a sudden?
I have using for a few months, I keep it in a dry place and power it with a 5V, 2 A supply. I don't use any other peripherals with it. I have tried different power supplies of the same rating.