I would strongly suggest that you download and install the V1.9 BIOS update from
http://www.asrock.com.tw/support/Download/dl_k7vm2.htm
I'm unsure if that contains a fix for the problem, as only details of the most recent two upgrades are provided, but that certainly sounds like a problem that only a BIOS update would fix. Instructions for installing the update are linked on that page.
Follow them very carefully. A failed BIOS update will render your motherboard useless. You must not lose power to the PC while the update is being installed.
Catweazle
Grandad
4,335 posts since Mar 2004
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Maybe someone else will have a suggestion, but I'm not hopeful. I've come across a couple of motherboards which exhibited similar behaviour and they simply turned out to be duds, I'm afraid. If updating to the latest BIOS version didn't fix it then I really don't know what will.
Catweazle
Grandad
4,335 posts since Mar 2004
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Solved Threads: 149