Be careful to not place the chip in wrong position, or you will probably literally burn out the BIOS chip. Both the chip and its socket have a marking called "pin 1". You have to march the pin 1 marking on the chip with the pin 1 marking on the socket.

Figure 8: Pin 1 notches on DIP chip and socket.

Figure 9: Pin 1 notches on PLCC chip and socket.

PLCC chips are easing to be installed back, because one of its side (the pin 1 side) isn't squared but triangle-shaped. Thus, it is impossible to insert them in the wrong position.