I have a 7 year old Socket AM3+ PC that I plan on giving to my son to enjoy. However the computer stopped turning on. I replaced the PSU with a new one and it still wouldn't turn on. Base motherboard would turn on though. I then checked the motherboard with each part until just the CPU was left. Once reinserted the PC refused to turn on. I then pulled out an old Socket AM3 CPU and tried it with that to see the PC starting up. Am I right then to assume it's just the a problem with a bad CPU?