I am having the same problem. I have the lastest bios 1002 for my P5E3 MB. Ive even tried four different jumpers to make sure that its is connecting properly. I have reset with battery and the cmos jumper but I cant get past chassis intruded.
I am wondering what all the people that have the same problem did to solve the problem? Some fix it by putting the chassis jumper on default and resetting cmos or do they all send the motherboard back and get a new one?
I was up eight hours yesterday trying to fix this. Im so upset. I have been building computer for 10 years and always manages to solve problem like this but this one is really getting to me.