(dell dimension e521) Does the Motherboard have a switch to wipe the bios?

I have a dimension e521 with the motherboard it came with and i need to wipe the bios manually. Is there a switch for that on the motherboard?
Thank you

 

Does sound like he meant reset.Some boards use small switchs and others use jumpers.
(but you already knew that,didn't you?)

 

I'm sorry but yes i did mean reset. Thank you for replying and i also dont know how to remove the button battery. Could you please explain.
Thank you

 

Most just have a small clip on one side that, when pushed away from the battery, will let the battery pop up.

 

Thank-you ill try that and see how it goes.

 

I tried it but it didnt do what i wanted so how do you flash the bios because i was hoping that would work to fix my problem.