MacBook Pro 13 (2011 A1278). It feeds, but does not see the SSD
When turned on in the disassembled state, you can see how the SSD lights up, which means it receives power, but the MacBook does not see it in the bootloader selection menu, not in disk utilities. Tell me, what could be the problem? Previously, it was very overheated and after that there was such a problem.
iMac 27″, macOS 10.15