C7000-100NAS randomly drops internet connection

I too had internet drop issues.

I had very similar power levels to the ones you posted. I see also that you have a ton of uncorrectable errors which was what I had also.

I focused my efforts on eliminating the uncorrectable errors. I read in other places that the ideal downstream power level is 0db and upstream should not be more than 50db. My levels were 4db to 6db downstream and 45db~46db upstream so I decided to try a 3db attenuator. Since I installed the 3db attenuator a few weeks ago I have not seen any unrecoverable errors. My downstream power levels are all below 3db now and my upstream levels are 47db~49db. I bought the 3db attenuator on Amazon for about $9. I will post here again if problems return. If you don't hear from me it means it is still working fine.

One other note, with so many uncorrectable errors you might have physical connection issues. Check all coax connections to make sure they are snug.