Answer to: My iPhone not connecting to carrierHave you checked the SIM card? He may have left it out or damaged the internal connector. I was able to use an original Apple battery and do a Full firmware re-install to get my iPhone 5 working.
Answer to: What can I do with a damaged eMac?You can take in it and have the power supply board checked out or replaced. May not be worth the time and cost to repair it. Ron