System gets message on startup after powering up
"BIOS has detected unsuccessful POST attempt(s)..."
and offers a choice of entering BIOS or retrying boot with existing settings. Neither works, and BIOS cannot be entered. After the initial splash screen, and typing F2, the above message repeats.
Up to now, the system has been operating without problems for more than a year.
After sitting for several hours, the system booted normally. Now, following subsequent shutdown, the message has reappeared. There have been no hardware changes or BIOS changes. When the system is in the failing state described above, the internal motherboard 7-segment display stops on "00 92", after running through several other values.
DZ87-KLT motherboard with BIOS KLZ8711D.86A.0453.2014.1007.1848
1) How can I find out the cause of this error? The Tech Spec says 0x92 means "Detecting the presence of the keyboard". After the "BIOS has detected unsuccessful POST attempt(s)..." message, typing Y or N on the keyboard is sensed, as it causes another iteration of the message after some re-initialization.
2) How can I fix the cause, so this error does not occur?