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Background
Purchased a Gigabyte motherboard (GA-78LMT-USB3) with a new computer about a week ago. The keyboard is a Unicomp 101-key PS/2 keyboard, which is what I am using to type this question (i.e., the keyboard works).
Problem
Upon booting the new computer all keyboard LEDs flash. The computer is unresponsive to any keystrokes (i.e., I cannot enter the BIOS, issue a three-fingered salute, or toggle the lock keys). Effectively, the keyboard is dead.
Workarounds
Tried using a USB-to-PS/2 adapter, but the problem persists. Interestingly, the USB port seems to give the keyboard more power, as the LEDs flash brightly when plugged into the USB port (full power) but dimly when in the PS/2 port (low power).
I wanted to try a KVM switch, but the maximum resolution for KVMs (immediately available) is 2048x, which is shy of the 2560x that I use.
A different keyboard for new computer is responsive.
Questions
My questions:
- Is the BIOS buggy?
- Has anyone else experienced such an issue with Unicomp (or 101-key, PS/2) keyboards?
- How would you resolve the problem?
Are different keyboards a problem when used with the PS/2 port and with a USB port? Does a genuine USB keyboard work? Or is it only PS/2-style keyboards that are a problem? – Nicole Hamilton – 2013-03-10T06:21:28.037
I'd actually try the keyboard on a older system. I believe this is a well known issue as per my answer, though I need to look into how modern systems do PS/2 conversion to be sure. – Journeyman Geek – 2013-03-10T06:23:48.247