The whole motherboard is under voltage, how to fix it?

Question

motherboards

The guys ran into a problem. After I changed the thermal paste on the chipset, when the motherboard is connected to power from the power supply or from the monitor cable, the whole mat. board is under pressure. Even when I disassembled the board, I decided to reset the BIOS settings, but I don’t know if it was successful? And he left a small scratch on the back of the board, near the same chipset.
Guys who are faced with a similar or someone has a guess what could be

Answer 1

An indicator screwdriver (any) is not intended (absolutely!) for use in electronics. Her destiny is to catch the phases in the outlet.
A screwdriver with a battery is generally a primitive hidden wiring finder (bad finder), and it cannot be used to search for a phase (it will also shine at zero due to pickups).
Briefly speaking. Stop poking at the motherboard with a screwdriver, they are not made for each other.