My motherboard died and I bought a used replacement. The replacement board has the ESN from the machine that had been trashed and sold in parts. It works great but the serial embedded in it is different than the one in my workstation's case. On the Z820 you could change it in the BIOS (Ctrl-A in the Security menu) but the same procedure does not work in the Z840. I just want it all to match. Any ideas? TIA
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