There are two possibilities to consider: (1) hardware failure on the board and (2) corruption of BIOS configuration.
I am leaning towards the issue being a hardware failure, so let's talk about this case first. The fact that the board will properly enter BIOS Setup when the jumper is in the 2-3 position does not mean that this cannot be the case; the BIOS uses only minimal resources - and it may not be affected by the failing hardware - in this case. Secondly, the fact that the board will sometimes boot and operate properly indicates (to me) that you may have a component that is failing intermittently, possibly as a result of its thermal state (i.e. it needs to be heated up to work properly). If I am right, your only resolution will be to replace this motherboard.
Ok, it you really want to try to recover the board (presuming the latter issue), here's what you need to do. Do it all and do it exactly as I detail it; it does not matter what you have or have not tried before:
- On another Windows-based PC (DO NOT USE A LINUX-BASED PC!), insert a USB 2.0 flash disk (DO NOT USE USB 3.0 FLASH DISK!). Reformat this disk using the FAT32 file system (I don't care if it has been formatted or used before, reformat it again!).
- Download the latest available BIOS file for your board (that's file BL0160.BIO). Place this file in the root folder of the USB 2.0 flash disk.
- Properly eject this flash disk before physically removing it from the PC.
- Unplug your DH67CL system from A/C power.
- Remove the CR2032 battery.
- Remove the BIOS Configuration jumper completely.
- Wait at least 15 minutes.
- Restore the CR2032 battery to the board.
- Plug the USB flash disk into a (black) USB 2.0 port (DO NOT USE (BLUE) USB 3.0 PORT!) on the rear panel of the board (DO NOT USE FRONT PANEL USB PORT!).
- Plug the system back in and press power button.
- At this point, if the board is working properly, it should proceed to install this BIO file using the Recovery method. If it does not, go no further; replace the board.
- If the recovery process actually worked, you should see a message telling you to to power off and restore the BIOS Configuration jumper. Disconnect A/C power and then install the jumper in the 1-2 position.
- Restore A/C power and press the power button.
- If it powers on properly, use F2 key to enter BIOS Setup.
- Set the date and time.
- Use F9 key to reset the BIOS configuration.
- Make any changes you absolutely need to make to the BIOS configuration (i.e. boot order, etc.).
- Exit BIOS Setup saving the configuration.
- See if it will boot (more) successfully.
Hope this helps,
...S
