Acer Aspire does not recognize the hard drive. 

Most common error message: Error 200

This problem is cuase by cold solder joints.

Try apply pressur on the chips in the picture and see if you can boot to the hard drive.  Try one chip at a time so you know which one is causing the problem. 

Note: Same symptom can be caused by one of the chip on the reverse side of the motherboard underneath the wireless card. It looks like a blue circle with a silver center . The component became separated from the board.  Try apply pressure to it and see if the system recognizes the drive.

Other known issue with SouthBridge chip. Try reflow.