My iPhone 4 had a faulty lock button (it was stiff, I had to press it hard to lock it and power on/off) and because it was out of warranty, I decided that I would replace the lock button myself. I bought all the necessary components, took the iPhone apart, took out the old lock button and the tape for it, then replaced it with my brand new one.
The new lock button feels perfect, it clicks and feels brand new. But there's only one problem, it doesn't actually respond when you press it, the screen won't lock and I can't turn off.
I tried restoring the device to see if that would fix the problem, but to no avail.
I've enabled Assistive Touch, but I would prefer it a lot more if the button simply WORKED, do you think I need to buy ANOTHER lock button sensor tape or is the problem something else?