PLEASE SOMEBODY HELP ME!!!

It means that the Chasis or the cabinet which holds the motherboard, CPU, GPU, etc. is open. It's a security feature offered by some OEMs where a connector found on a motherboard can detect if the chassis component has been removed or replaced. Some OEMs also offer onboard speaker or PC chassis speaker which goes off in situations like these.
This is a hardware problem, and in most of the situations, you need to put the jumper back on the motherboard with the pin labeled chassis signal and ground. Sometimes OEM offers a simple switch which is automatically armed when you close the chassis properly. So check if that's the problem you are facing.

http://vip.asus.com/forum/view.aspx?id=20081024173658250&board_id=1&model=P5K-E%2FWiFi-AP&page=1&SLanguage=en-us
http://howsolve.com/2011/09/how-to-solve-chassis-is-intruded-fatal-error-system-halted-problem/
HERE ARE A COUPLE SITES DESCRIBES CHASSIS INTRUDED.AND WHAT YOU POSSIBLE CAN DO ABOUT IT.READ IT CARFULY.

The reason for this error is Overheat! Please replace the CPU Fan with a new one and add additional Fan for the CPU Cabinet in order to cool the CPU. Then, reset the BIOS to default value by pressing the F2 Key or Delete Key at the Startup and select Load Optmized Defaults or Load Fail Safe Defaults option. This should resolve the issue.

Good day! here's the following steps hope it will help you.

Unplug the computer
Take the MOBO battery out
Remove the chassis jumper
Wait a few minutes
Replace the chassis jumper
Replace the MOBO battery
Plug the computer in

If your case is not setup for chassis intrusion, the motherboard has dropped a jumper.
The location is by the last PCI slot between the CD audio connector and the USB bus plug. (it is right next to the CLRTC jumpers)

Good luck

okae...
first should you do is.. buy a new motherboard.. because like my motherboard, there is no solutions for that error nd problem...tnx

first you have to check the RAM,, then mother board or processor,, ,,, make sure the pc while booting memory check is going with out problem..s

you need to go into the bios of your pc.....usually pressing the delete key when you see the first logo screen after booting up....look for a section that relates to errors and what the bios is supposed to do when it encounters an error.
i.e if you see a line in the bios that says "halt on all errors" disable it and when you next boot up the bios will not stall.

I'm not familiar with that particulat model, but I'd guess the motherboard has a chassis switch connector, and senses the chassis be open. Could be because: - chassis open (close it), - switch defect (as a workaround, you could short-circuit it, or just unplug it - whichever solution works for you). As another workaround, you can probably disable this switch in BIOS.

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