Mac address was invalid in both cmos and flash!


when i power my new computer i says
press F2 for setup
Press F11 for boot menu
mac address was invalid in both cmos and flash!
press F1 to contenue

and then i press f1 and it is loading vista but then the network not is working
what can i do?
3 answers Last reply
More about address invalid cmos flash
  1. Did you just flash the motherboard? Can you change the mac address in the BIOS?
  2. If the computer or motherboard is still under warranty get it replaced. I had same issue with asrock board and was unable to repair. eprom/bios has been damaged/corrupted and only a few boards will let you change mac in bios. reflashing bios might work but I doubt it. you need a bios flash that alows you to set mac before flash. this needs to match the mac that is printed on the board (usually on a sticker near lan port. Your onboard ethernet likely wont work until this problem is fixed. You will have to buy an ad on NIC card to access networks/internet. DO NOT ATTEMPT TO REFLASH MAC UNLESS YOU KNOW WHAT YOU ARE DOING! if you screw it up your computer will not boot.
  3. By: z987k
    mac address are invalid in both CMOS and Flash

    I just spent a considerable amount of time fixing a bad bios flash and I wanted to post this up in case anyone else out there comes across it so they will know what to do. Motherboard is an ASROCK 4CORE DUAL VSTA

    After flashing the most current bios to a new plcc chip, I got the error "mac address are invalid in both CMOS and Flash press F1 to continue" on startup. This prevents your onboard nic from working as it can't be talked to without a mac.

    So I download the mac address changer tool from ASROCK and used as they said to, but got a "write mac function call fail" error when writing the correct mac address. Apparently something is either wrong with their tool, or that tool does not work for the 4CORE DUAL VSTA.

    A correct and working tool is found here:
    and here:
    and the attachment to this post here: MAC tool.tar.bz2
    Documentation is provided in a readme within the ZIP. If for some reason those links quit working, PM me, I'm sure I'll keep a copy of it somewhere as important as it is.

    Hope this helps someone in the future.
Ask a new question

Read More

NICs Flash Mac Address CMOS Components