D-Pad going left without it being pressed?

Ok, so as the question states, the D-Pad in my 3ds just continuously goes left ALL the time. i pulled the system apart, changed the contactor pads underneath the buttons, and the D-Pad, cleaned all crud in the system, and even checked over the whole mother board and nothing is missing, nothing is lose, I even tried disconnecting the D-Pad and the contactor pads all together and it still continued to happen?! Any ideas or help? Nintendo won't take the device, it's out of warranty, and it's been opened.

Thank you.

-Jolts