How to check the CPU temperature in real time without using any software!

4) Don't put the side panel back on at all! There are no lethal currents on the board. It's summer now, and I always take the side panel off for the summer.

No, you shouldn't do it this way. A closed panel ensures airflow inside the system unit and, as a result, more effective cooling. When the panel is removed, this airflow is lost, and the fans working to exhaust and intake air (if any) end up working in vain. Moreover, the air temperature is still high in the summer, no matter what. So, removing the panel can only be harmful. I myself used to keep the panel off out of ignorance, and when it was time to upgrade my computer, I faced criticism about it. I also looked up the opinions of experts online.