Hi, I replaced the case on my psp1000. When I put the thing back together I found the power switch doesn’t spring back like it used to. So if I turn the PSP on I have to physically push the switch back into the middle position otherwise it turns off again. Is there some sort of spring mechanism that I’ve missed? I have replaced the plastic switch and the yellow tab that it clips into. How does the spring mechanism work exactly? Hope this makes sense. Thanks!