I have an i7-1165G7 FW board in a Cooler Master Motherboard Case. It was working until I unplugged it from the power supply. Now, it is completely dead; no LEDs turn on when I plug the power supply back in.
The RTC battery seemed to have drained fully, which I don’t get because it was definitely not unplugged after the last usage. So it should have been fully charged. As far as I understand, the RTC battery drains when the Laptop is not charged for a longer period, e.g., 8 weeks+ and soldering fix is that it charges from the main battery. But as I have the issue in the Cooler Master case in standalone mode, I wonder how I got there.