I disassembled a laptop (an ASUS ROG G752VY) to replace a CR2032 bios battery. It was disassembled for two days with the motherboard disconnected from the laptop battery.
When I re-assembled the laptop, the first time I realized I hadn't plugged the battery back into the motherboard since it was not detecting any battery at all. However, when I took it apart again, I noticed this and plugged it back in. Even though it's plugged back in now, I'm still having an issue:
When I am in Windows, it shows an "empty" battery symbol that says "Plugged in, not charging." I tested unplugging the laptop while it was turned on, and it immediately powered off. So clearly the battery isn't working.
I also noticed that the laptop has an LED for the battery that is flashing red constantly, even after being plugged in for hours.
Any idea what's causing this or how to fix it? Everything should be plugged back into the motherboard now, so I don't know if this was caused by me powering it on at one point without the battery connected or if it is something else. Did I damage the battery somehow?