I forgot my supervisor password on an Intel DH87MC with Core i7 4770.
According to the users manual, setting the BIOS security jumper to:
1 & 2 = Normal Mode
2 & 3 = Lockdown Mode
None = Configuration Mode
In Configuration Mode, I'm supposed to select [2] to clear the passwords.
But when I remove the jumper and power up in Configuration Mode, the system doesn't POST at all.
The power LED turns on, the fans spin, but there is no display.
I have an nVidia card (new GTX970) so I tried moving the DVI cable to the 2nd port on the nVidia card - still no POST/Display
I tried moving the DVI cable to the onboard Intel HD graphics port - still no POST/Display.
I disconnected all USB devices thinking it's trying to load a BIOS ROM from a USB flash drive - still no POST/Display.
I disconnected the SATA PCI Card - still no POST/Display.
I tried updating the BIOS to the latest MCH8710H.86A.0162.EB.EXE - still no POST/Display.
I tried holding down the power button, it powered up, turned off, and then powered up to the Power Button menu, but that wasn't much help.
I tried Lockdown Mode, everything is indeed in Lockdown Mode. Can't enter the BIOS.
Things I haven't tried, but I doubt it would make much difference:
/ Removing the CMOS battery for 1 hour (apparently this doesn't affect the passwords)
/ Disconnecting the HDD's and Sound card and nVidia card (wouldn't imagine these would make a difference)
What am I doing wrong?