Cmos checksum error

Hi i seem to get a lot of dust in my computer i have cleaned it out but cant get it all out from the fan is there any other way to do this i have the dimension 8400 and the other thing is when i start it up i get a bell going off inside and the only way i can start it up is to go into setup f2 and then exit and it will boot into windows ok got xp can anyone help with this. Thanks

What kind of ringing noise is there?

Original posting Differant thread 03/21/06:
The noise i get is a continous beeping noise and the only way i can get into windows is to press f2 into setup and then exit and it will go into windows then.

 

Ok the beeping noise is an error alarm. clikc the link below and find out which alarm is it for.

http://support.dell.com/support/edocs/systems/dim8400/SM/adtshoot.htm#wp1052933

 

Replacing the battery may need to be done but save that as a last resort.  See where the beep codes fall and let us know.

 

-James

Thanks to all off you that helped me i have sorted it out now it was a faulty keyboard that was giving me all the probs.