Chosen Solution

Hello, I have an iPhone 5c who is not booting (black screen) and when connected to a power source it gets very hot. I suspect this is a sign of a short circuit. When opening the device I noticed that one of the shields on the motherboard was bent a bit. I was wondering if this could be the cause of the overheating. Thank you! P.S. The overheating does not come from the bent shield but from the shield with a QR code on it

Remove the EMI shields and get a microscope or magnifying glass and inspect for shorts. Did the phone have water damage?