After replacing M/B on a couple of 2970 and upgrading to Bios 4.2.1 M/B's wend off.

Same problem appeared with next 3 M/B's followed the first one.The servers work fine with older bios versions (1.3.2 or1.5.4) until we upgrade to latest one.

then crashes NO POST and errors about vdd voltage E1221 E1222 on lcd

Customer has 5 2970 working for 3-4 years without problem.After replacing M/B for some reason and upgading bios problems appeared.