Question about ASUS P5P800S Motherboard
When i boot PC show messsage error "CMOS Checksum Bad, Chasis Intruded, Fatal Error, System Halted" and i can't logon to menu BIOS setup if i press DEL or F2
Something has tripped the chasis intrusion on the motherboard.
This is a security device that disables the system should someone unauthorized open the case.
Unplug the power supply, open the case. Down near lower edge of the board there is a connector with several wires attached marked Panel a bit farther up from that there is one marked CHA_FAN between that is one marked CHASIS this is the connector we need to deal with. If there are wires attached to it trace them back to the module attached to the case. there should be a reset switch on this device be sure to reset it just before closing the case again. If you can not find a reset switch on it remove the wires from the connector and tuck them away (Note doing so will mean the intrusion detector will not function any longer) If there were no wires look carefully to see that nothing has shorted (connected the pins) accidentally. If so it might be advisable to blow out the case with a can of compressed air to prevent it from happening again.
OK now we need to clear the fault from the bios. There is a battery (Silver disc: watch style) on the board. Pull the battery. Now there is a 3 pin connector near the battery marked "ClearRTC" that has a jumper on pins 1&2 move it to 2&3 now wait for 15 to 20 seconds
restore the jumper to pins 1&2, replace the battery, close the case.If the intrusion detector is still functional reset it. Plug the cord back in and boot up the PC you should now be able to get into it.
You will have to go into BIOS to adjust settings again including set time and date.
If this method does not help then the error is likely internal on the motherboard, and will need to be repaired or replaced by an authorized service tech.
Hope this helps
Posted on Nov 26, 2008
Try to reset the BIOS to factory settings
1. Turn off the power and unplug the power cord.
2. Remove the onboard battery.
3. Move the jumper capfrom pins 1-2 (default) to pin 2-3 keep it to 5 to 10 sec. then move the cap back to 1-2.
3. Re-install the battery.
4. Plug the power cord and turn-on the computer.
5. Enter the BIOS set-up by holding the DEL key and re-enter the data.
i hope it helps!!!
Posted on Nov 26, 2008
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