The answer to 'panel upgrade not working' is that there could be several common causes, such as improper installation, outdated equipment, or issues with the main power supply. Symptoms may include flickering lights, tripped breakers, or the inability to power new appliances or devices.
If your panel upgrade is not working, it's important to first check the basics - ensure all connections are tight, the main breaker is turned on, and the new panel is compatible with your home's electrical system. If the issue persists, it's best to call a licensed electrician to diagnose and resolve the problem. Attempting to troubleshoot or fix a panel upgrade yourself can be extremely dangerous and may result in further damage or personal injury.