"Why does my Atari show a blank screen when turned on?"に関する回答It could be the RF module. Another solution could also be necessary to make adjustment of the contacts which hosts the game cartridge. Clean and adjust.
"How to fix the left bumper"に関する回答Look at the front of the control cabinet. In the part where it rests on bumper, there may be attrition. Also the micro-switch may be damaged
"How to repair a loose analogstick?"に関する回答You need to change the potentiometer. You can get a potentiometer in good condition, by an original xbox control.