What question? I have only seen you use the ? mark once in your comments and it was regarding removing the bag. Well we told you to remove it your DOLT. You've damaged the board doing that. End of story! The reason the north/southbridge was running so hot was because you were SHORTING IT OUT. As to what way electrically this was affecting it to create the heat is anyone's guess.
There is perhaps a thousand potentially shortable legs and SMDs on the bottom of a motherboard. Most of the potential legs you could have shorted out come from connectors on the top of the board. Like the ATX connector, the memory slots, PCIe and PCI slots. Understand that any female connector or socket/slot of any type is mounted to the board through holes then solderedd at the backside/bottom of the board. Those legs poking down would be shorted by the bag.
You probably picked up current from the ATX socket's legs and jumped it into the memory, PCI/e or USB socket legs into chassis ground. Anyway you look at it you've damaged the board.
Understand that electronics can partially work or be damaged but still run and operate. Just not run or operate well/properly like so many experience here LOL
I suggest OP you purchase this book.
PS He claims that people do this all the time from what he's seen... IS THIS TRUE!!! WOW IF lusers do that here that would account for a lot of the hardware issues!!!Edited by HiroPro - 8/17/11 at 2:03pm