I was using my Raspberry Pi 3B+ uncased and it was working well, showing the Raspbian desktop. I wanted to make my keyboard wires less messy so moved them but probably touched something else because the screen went off and the ACT light stopped blinking. Since then, there has been no ACT light even though I have repeatedly tried to boot the Pi. SD card works well with another Pi so the issue lies with the Pi. The red light is constantly on when I press the switch for the 5V 3A power supply and voltage is still around 5V btwn PP2 and PP6.
I tried USB boot using 2 thumbdrives (one from Bosch and another SD card reader thumbdrive) but no sign of booting or SD card reading. I had not configured USB boot before but I read that Pi 3B+ have it turned on by default.
Is my Pi repairable still or should I throw it? Any suggestions please? Thanks!