Sony Xperia TL Troubleshooting
Released: November 2012 Model number: LT30AT
Your screen is simply cracked and needs to be replaced.
Purchasing a new screen will have to be necessary , however reserving all of the old parts is a possibility. Here is the screen/digitizer replacement guide.
Either the phone does not respond at all to touch or it only sometimes works.
Your battery needs to be replaced.
We all know that sometimes our battery quits working to replace the batery, check out the battery replacement guide.
The headphone jack may be damaged or disconnected. It may either need to be replaced or reconnected.
The speaker needs to be replaced in order to revert back to normal sound.