CSGO Problems after double power outage

So I play csgo on 4:3 resolution due to the fact that I only have a 60hz monitor and cannot play the game smoothly on 16:9. Today after two power outages, I turned csgo back on. It was running just as "heavy" on 4:3 as it does on 16:9, the whole reason I switched. So my question is: Was my monitor messed up by the power outages, and if so, is there a fix or should I get a new monitor. Thank you!