When booting up, my Sony Desktop (5 years old) has on a couple of occasions made a stranging whining/whiring sound which I guess was a fan Sure enough I'm getting a message something like "Abnormal Fan - press 1 to continue or 2 to enter setup" (white letters on a black screen). The first time was when the machine was locked up and I cycled the power (rather quickly). The second time (today) was a reboot. So it seems to happen when the fan is probably still spinning and it gets restarted. Today I pressed 2 and went into the BIOS. Under power it shows the temperature and speed of three fans. The attached picture shows what they say. Does this indicate that I need to replace a fan? Is this something I can do (I don't solder or anything like that).