I think this topic has been discussed before but I can't find it when I search so sorry if I am asking a question that's redundant-- it's my first post and I'm not very computer savvy (but I can follow clear directions!)

We recently started getting the " Alert! Previous Fan Failure" notice when booting our Dell 4600i series computer. I can see that there are 2 fans when I look at the back of the computer-- our cpu stands upright and the top fan runs ok. It looks like there is a fan below it-- which fan is this and should this fan be working ( stupid question,I know but I did tell you I don't know anything about computers). How serious is it if this fan isn't working and how do I fix it or get it fixed??

Thanks in advance for any help you can give.

What you are describing is the PSU (power supply Unit) fans.

The cpu and its' fan are inside the case on the motherboard.

Check your manual or the Dell site for your specific comp and find out what generates that error. Do so before you play or run anything cpu intensive so you don't burn out your cpu.