iPhone LCD Display/Screen Related Issues: Problem : When display is either flickering, dim or completely blank and in some cases when the backlight stops working. That is when your iPhone display looks yellowish as it would with night mode on. People usually assume it is a fault with their iPhone LCD unit. Which is true however, it could also be a result of water damage, dust, dirt or even a loose connection. Solution: iPhone is a complex device with integrated units working in conjunction, so opening it yourself is not advised. This requires professional support to diagnose the problem and resolve it effectively. In this case the best option is to dial iRepair to get professional support.