I have these two machines a C253nd C450; the NVRAMS are faulty and the machines are not able to boot fully. I have change MFP boards from other machines along with their NVRAMS and the machines booted well. I know for certain that the problem is with the NVRAM. Tried to upgrade firmware but in vain. Is there a way to particularly rewrite data to the NVRAM or how to deal with such problems with the NVRAM?
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