Flickering lights, sometimes no power to some
You may have a lost pole/phase or neutral. That is very serious problem but the good news is that in most places you can call your electric utility and they will check and likely fix it as most of the time this is a utility problem and not a problem in your house. Key clue is a 240v load making 120v loads work.
CALL YOUR ELECTRIC UTILITY AND TELL THEM YOU HAVE A PARTIAL OUTAGE AND DESCRIBE THE PROBLEM.
Until this is fixed you may have more problems - including risk of damage to equipment or fire - than you realize.