Hi,
the x230 is quite good working, ... but recently some boards died (I know from 2 boards over the last years). I'm still not sure why they died, but rumors that the EC firmware ran into a bug when doing In-Circuit flashing.
I've an x230 myself and never managed to trigger that bug. I would recommend you to update the EC to the newest firmware. The EC firmware is updated together with the bios, so updating the vendor bios/uefi is enough.
We can also desolder your spi chip, programm it and put it back. But that's also a way I wouldn't recommend doing to often.
Best, lynxis