LCD Horizontal white and black linesReplaced battery, worked for 2-3 days then battery stopped taking charge. Opened up again to disconnect and reconnect battery...
Answer to: iPhone 5s screen blank after dropping in waterLong shot but have you tried with another battery? The behavior you describe sounds similar to what I had on one of my iPhones when the battery died - replaced it with a new one and has worked ever since. However; your device has been subjected to water - that could produce some odd faults. Good luck.