xperia m2 backlight problem

@noname123 as with any water damaged phone, you need to be aware that the chance are always slim to get it back to normal. the longer you wait the less of a chance. It is imperative that you do not use the phone, remove the battery. Disassemble the phone using these guides and clean all the parts with high grade isopropyl alcohol and a soft brush. Use this guide for the cleaning. It was written for an iPhone but all the points are still pertinent to your phone as well. You must also remove all EMI shields. Repeat this process a few time. While you are cleaning it, check for any missing, corroded or otherwise suspicious looking components. Once it is properly cleaned, replace the battery and reassemble. Then reevaluate for any damage. It is possible that a new front display will be needed, but without proper cleaning anything will only be a guess. Hope this helps, good luck.