A scheme may be used to replace a processor in a multiprocessor computer without the need for turning the computer off to replace the processor. In this scheme, all of the processors on the bus are placed into sleep mode. Then, power is disconnected from the processor to be replaced, and the processor is removed. The replacement processor is then powered up and configured in the same manner as the processor it replaced. The replacement processor is then placed into return the computer to normal operation without the need to reboot the computer.