Won't switch on after switching in another laptop's SSD briefly
This 15” MBP is my emergency laptop. But my main 13” MBP (containing all my ongoing files) was having some issues and needed repairing, so — since both laptops run OS High Sierra, and both use Samsung SSDs — I thought I could just take the SSD out of my 13”, put it in the backup 15”, and continue to work off the 15” until the 13” was fixed.
It didn’t work: The 15” wouldn’t recognise the switched SSD (flashing question-mark folder).
So I put the original SSDs back in their respective laptops … and now the 15” won’t switch back on. (It switched on initially, but then powered itself off at some point in the night, and then … nothing. Since then: No power, no light, no chime, no life at all. It’s just acting completely dead.)
- The battery was in good condition before this. I’ve obviously tried taking it out, reseating it, and putting it back in.
- The power cable light shows green. I have left it charging overnight for hours and in the morning … still no life from the laptop
- I have tried SMC reset
- I thought from similar posts (e.g., My Mac won't turn on after I replaced Hard Drive AND Computer dead after hard drive replacement) that I might have damaged the SATA cable. But I’ve bought a new SATA cable and installed it and … nothing. Makes no difference
It’s infuriating. It was fine, and all I did was try to use a different HD – didn’t work and put the original back in – and now the laptop is completely kaput. (And it looks like I’m not the only one having this sort of problem — e.g., After HDD Replacement, Won't turn on)
What could it be??