I had a Samsung Laptop that I broke while trying to downgrade the Bios image without properly downgrading some other controller image first. The only problem was that the soldered EEPROM had the wrong image and thus the laptop decided not to start. Samsung wanted to charge 700+ Euros (CPU was soldered to the motherboard).

I was really confused that the world's biggest electronics concern wasn't able to replace an EEPROM. Luckily I came across bios-fix.de and paid 65 Euros including shipping to get the old eeprom soldered out, flashed and soldered back in.

I wish bigger companies would actually try rather than going down the service path of least resistence :(