That sounds incredibly frustrating — your Camon 11 dying right in the middle of glass separation is every DIY repairer's nightmare. Don't panic just yet.
First, try a hard reset: hold the power button for 30–45 seconds. No response? Leave it plugged into a charger for at least an hour — sometimes the battery disconnects internally during separation and needs time to reset.
If that fails, the issue is likely a loose ribbon cable (battery or display flex). You'll need to reopen the phone carefully, unplug and reseat every connector firmly. A surprising number of "dead after repair" cases are fixed this way.
For future repairs, using the right tools and adhesives makes a huge difference. Explore full collection here for reliable supplies: explore full collection