iPhone 4S not retaining charge + no service

Hi everyone,

My iPhone 4S dock connector died so I tried a DIY repair job to swap it - which worked but b0rked some other things in the process and i was hoping for some advice...

So i swapped in a new charging dock connector and now it starts up, but doesn't retain a charge (battery indicator says 100% full but dies as soon as i unplug) and the network says 'searching' with WiFi not working...

What's wrong with it?

I've bought a 5S anyway, but would love to get this one back up and running as a spare

Any tips appreciated, Thanks :-)

Owen