What caused this problem??

gyro is probably out.

The 'screws' you talk about are the tail and the gyro mixing pots.

With the cables in your right hand, the gyro pot is on the left and the tail pot is on the right.

There are some images and similar discussion over at a thread titled: 'Need help w/ Aerohawk board. '

I am searching for a good source for Ceramic Gyros, I'll let you know if I find it.