Your flash assembly piece will not always pop up if its supporting screws are loose.
To fix this possible loose screw problem, you need to locate and tighten them with a screw driver.
Manually pop open the flash assembly with a toothpick, or like tool, and then tighten the supporting screws on the left and right sides of the flash assembly.
If your flash assembly still fails to pop up, check out the following [[Minolta QTsi Maxxum Troubleshooting|troubleshooting page]] for more help.