"iPhone 4S keeps searching after screen replacement"に関する回答Had the same issue this week - put it into and out of airplane mode and it promptly hooked right up to the carrier.
"-1 error in iTunes restore iPhone 3GS"に関する回答Handy link: http://support.apple.com/kb/TS3694 That page lists some error codes, but doesn't suggest anything specific for "-1". Recommends trying to restore on another computer but nothing further if that doesn't work.
"Screw damaged on the Buttom"に関する回答If, like me, you have plenty of the cheap screwdrivers that sometimes come with screens, you could carefully superglue one of them to the head of the problem screw to get it out, then chuck them both in the bin.
"White screen after opening the phone"に関する回答I could be wrong but I think a white-screen happens if you connect the battery before the screen flex cable. This happened to me the first time I changed a screeen and I had to fit another new one.