No Service after Screen Replacement

Hello,

I've been replacing screens for phones for awhile now and this is the first time I've had this issue. I replaced the screen on an iPhone 4S CDMA Sprint phone. Aftwards the phone would not obtain service at all. It says searching and then eventually says no service.

I did a lot of research and tried all the fixes that people have said such as changing the data or turning on the phone without the sim card. No go, none of them work. I then purchased a new antenna and replaced that but still have no service at all..

I'm not sure what else to do. I see many people having this issue with the iPhone 4 needing to replace the blue inductor coil but I haven't seen this for an iPhone 4S really.

I'm not really sure what else to fix on the phone, everything else works flawlessly. Is there any other parts I should throw at this repair to try to fix it.