http://www.ebay.com.au/itm/OEM-ALCATEL-ONE-TOUCH-SONIC-LTE-A851L-REPLACEMENT-LCD-TOUCH-SCREEN-FRAME-FAIR-/161744852856?hash=item25a8be9778 I'm pretty sure buying the same phone will be cheaper, But if you need information out the device then this is your only option, OR try finding a used phone just like yours and take the screen out of it, as this option might be cheaper. good luck.
Only solution is performing a hard reset / factory reset , Which will lose all data on the device and will be go back to factory settings just like when you bought the device brand new and will be able to set it up again. ( This time don't forget lol ) Look at this link, Has all information about hard reset. http://www.hard-reset.com/acer-iconia-tab-a500-hard-reset.html
Hi Sammy Has the phone been dropped recently ? If not have you tried doing a master reset? Might be a glitch or software issue and could be just as easy as doing a reset IF NOT all the details about resets are on this link http://btsc.webapps.blackberry.com/btsc/...
Alcohol cleaning on the motherboard will MAYBE solve the issue by cleaning out the corrosion areas on the motherboard, Although some times the water may go under the plates , Which then you have to take off the protective plates and clean that also. Further down the track alcohol will dry out the motherboard and will cause additional problems such as Rust, Unless the actual component that has been water damaged is replaced. For a device like the IPhone 6 IF you do have your warranty with apple I suggest take it there better as the will be replaced for $$$. Also if you change parts or anything by entering the phone will void your warranty. Goodluck :)