Isokivi, what kind of heatsinks did you use?
Next time take a paint stripper to remove a damaged chip:)
If anybody decides to use a paint stripper, first cover the undamaged area around the chip with some aluminium foil to protect it from the heat. First start out slow, so the board has a chance to heat up, and then increase the heat to take it off quickly.
Actually paint stripper is quite safe considering how rudimentary it is. I once managed to change a laptop gpu (yes one of those dreaded large nvidia mcp chips) and using hot air gun and laptop still works, but unfortunately some connections are not perfect I think and once in a while it draws strange stuff to the screen :p