Hey guys, I have an iPhone 4 and its power button was unresponsive and was not returning to it's standard position so I ordered the a new button and power sensor flex. However, after replacing the flex after noticing the silver nub button for the power switch was broken I just replaced the flex. no I am finding that the proximity sensor is just plain not working i can not see any discernible damage to the flex itself and am wondering is it worth trying a new flex or something else what am I doing wrong?