Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Highlighted
Beginner
2,343 Views

Chassis Intrusion; Asks for Password; Cannot Reset Bios - DH77KC Motherboard

Jump to solution

Hi! My name is Alex and this is my first time posting here, but has been around for a long time looking for solutions. And regarding my problem, I know there is a lot of threads about it, I've read almost all of them, but none of them worked for me. I already tried contacting Intel, but their solutions are the same with what I tried.

Anyway, back on topic.

Last weekend, I decided to clean my CPU for first time in a year, and opened the front and back case. When I turned on my PC, a warning showed up saying "The following warnings are detected during this boot. These can be viewed in the Setup in the event log. WARNING: Chassis Intrusion". The warning shows up just after Intel Logo shows up where you can press F2, F7, and F10 for BIOS Setup, BIOS Update and BOOT Settings respectively. The problem is that after the warning, it asks for a BIOS password, which I have forgotten a long time ago (can't even remember setting it) and I cannot bypass this warning by pressing F2 to go straight to BIOS settings. I tried entering blank, 123456, and other default passwords I find on the web.

I have already tried removing the 24-pin motherboard ATX power connector and 4-pin CPU power connector then removed the battery for almost a day and put it back in; the BIOS settings did not reset; also tried setting the Jumper to pins 2-3 (CFG) from pins (1-2) BIOS to configure the BIOS on boot up, but the Chassis Intrusion warning still takes over, asking for a password. And lastly, I also tried putting a jumper on the Chassis Intrusion header (It's composed of 2 pins only.) Still didn't work.

My guess is that, as long as the Chassis Intrusion event is still recorded in the BIOS event log, I can not do anything unless I type in the damn password.

Sorry for the lengthy post, I just want to get into details to avoid getting another solution I tried already and I really need my PC to work again to start practicing C++ and learn programming. Any OTHER ideas? Any other input would be very much, greatly appreciated. Thank you very much!

0 Kudos

Accepted Solutions
Highlighted
Super User Retired Employee
321 Views

Yea, this is a bug in the BIOS that has been seen previously (and even recently). Try installing (or reinstalling) the latest BIOS available using the recovery method. Then, use Maintenance mode (i.e. restore BIOS configuration jumper to pins 2-3, not 1-2) to get in and clear the password.

How old is your board? Without knowing password, if these things don't help, you may be looking at having to replace the board. If less than three years (and your have receipt), Intel will replace it.

Hope this helps,

...S

View solution in original post

0 Kudos
10 Replies
Highlighted
Super User Retired Employee
322 Views

Yea, this is a bug in the BIOS that has been seen previously (and even recently). Try installing (or reinstalling) the latest BIOS available using the recovery method. Then, use Maintenance mode (i.e. restore BIOS configuration jumper to pins 2-3, not 1-2) to get in and clear the password.

How old is your board? Without knowing password, if these things don't help, you may be looking at having to replace the board. If less than three years (and your have receipt), Intel will replace it.

Hope this helps,

...S

View solution in original post

0 Kudos
Highlighted
Beginner
321 Views

Thank you for your response.

I built my computer around April of 2013, so the motherboard's a little over 3 years now.

Excuse me, but if I may ask, what would be the proper steps in reinstalling the BIOS using the recovery method?

0 Kudos
Highlighted
Super User Retired Employee
321 Views

Instructions are here: http://www.intel.com/content/www/us/en/support/boards-and-kits/000005630.html?wapkw=bios+recovery Recovery BIOS Update Instructions for Intel® Desktop Boards.

0 Kudos
Highlighted
Community Manager
321 Views

Hi NewbieAlex,

 

 

I am following up on your case. Let me know if Scott's suggestion solves the issue.

 

 

Regards,

 

Mike C
0 Kudos
Highlighted
Beginner
321 Views

Yes. Thank you.

0 Kudos
Highlighted
Community Manager
321 Views

Hi NewbieAlex,

 

 

Thank you for your feedback.

 

 

Mike C
0 Kudos
Highlighted
Beginner
321 Views

I'm having the same problem - however the board does not boot into Maintenance at all - brings up the Chassis Intrusion error, then goes straight to requesting a password.

 

Have tried to reflash as per the Recovery instructions, still nothing.

0 Kudos
Highlighted
Super User Retired Employee
321 Views

Yep, you're hit a nasty bug in the BIOS and, once you get that CI latch set, you are in a Catch-22 situation from which there is no solution. Getting BIOS Recovery going can be problematic. Here are some additional do's and don'ts to apply:

  1. D​o not use USB 3.0 flash disks. Use only USB 2.0 flash disks.
  2. On another Windows​-based PC, reformat your USB flash disk using the FAT32 file system (do not use vFAT or exFAT) and (very important!!) do so with the Quick Format option disabled (unchecked).
  3. Place ONLY the one .BIO file onto this USB flash disk.
  4. Insert the USB flash disk into a black USB 2.0 port on the back panel of the board. Do not use blue USB 3.​0 ports. Do not use orange USB charging ports. Do not use any front panel USB ports.

L​et me know how it goes...

...S

0 Kudos
Highlighted
Beginner
321 Views

Cheers, will give that a crack now - previously it seems the Recovery flash went ok though... https://imgur.com/a/ybnWZmv

That was using a FAT32 formatted bootable USB (created with Rufus).

 

Here's what else I've tried:

- Moved CMOS jumper to Configuration (pins 2-3). Still requires password to progress past POST.

- Removed CMOS jumper and re-flashed latest BIOS (KC0112) from USB. Flash appears to be successful.

- Removed CMOS jumper and re-flashed next oldest BIOS (KC0110) from USB. Flash appears to be successful.

- Tried flashing latest BIOS, then going straight to Configuration.

- Removed CMOS battery for an hour or so.

- Removed CMOS battery and held power button on for 30 seconds to drain.

- Tried flashing, removing CMOS battery for an hour or so, and booting normally.

- Tried flashing, removing CMOS battery for an hour or so, and going to Configuration.

- Tried with a different jumper on the CMOS header.

- Tried Maintenance / Recovery steps with a jumper on the Chassis Intrusion header.

 

When replacing the CMOS battery, on the first boot I get the 3 additional CMOS Checksum, Time, and Battery errors, but they clear on the next boot.

0 Kudos
Highlighted
Beginner
321 Views

Reflash appears to have worked (same as above image), but booting back into either Maintenance or normal boot still brings up the password prompt, after bitching about the Chassis Intrusion.

 

Got me stumped.

0 Kudos