Why do some spaces in my electrical panel not provide any power?
You should verify the voltage across the mains this sounds like a bad leg. every other breaker on each side is fed from 1 leg so it could look to be random. Example breaker 1, 5 &amp; 9 all being fed from L1 then 2, 6 &amp; 10 on the other side being fed from L1. It may look random at first but a bad leg is more probable than anything else based on your question.