Chosen Solution
Hey, I ordered the battery replacement kit and attempted to replace the battery on my iPhone 5. The first attempt was probably successful. With the display showing the “battery critical” indicator after replacing the battery. However, after over 1 hour of charging with no change of the indicator, I got paranoid and opened the iPhone 5 again, disconnecting and reconnecting the battery connection. After reassembling my iPhone, the display is no longer displaying anything.
It seems your display is damaged/defective. This guide shows you how to replace the screen, and has the links to the needed parts and tools.
