"Touch screen not working"に関する回答Hi Mike, it sounds like there is an issue with the ribbon cable? If that is the case, you should just order the part from eBay or a wholesaler and if you are comfortable enough I would say go for the soldering. Just remember it is a different thing soldering on computers vs micro boards like phones.
"Why does my iPhone keep constantly rebooting every 60 seconds?"に関する回答There could be a few problems. First, there can be a software problem that can usually be solved through a restore or an update. Second, if you ever had any kind of repair on your phone by a third patrty, there usually is a problem with grounding. There are multiple points on the iPhone that help it stay grounded. All screws and parts are there for the phone to function like it was intended. However, if these parts are neglected, the phone will have issues.