Lack of picture in the screen is the main effect is you have a broken LCD screen. And so what to do with broken LCD screens? Well, you have two options. Either you can just have the broken one replaced with a new LCD screen or you can simply buy a new LCD screen in general. The latter is the most convenient way to do it as sometimes having it repaired takes time and may only make you spend more money that you actually think you can save (unless if it is still under your warranty insurance).
But if you are a bit adventurous and you want to give the DIY fixing a try, then there is no stopping you. Sometimes it can be easy for the damage may just only be on the outer glass; it only needs to be replaced if that is the case. However, if the damage is up to the inside glass then you might have a hard time fixing it yourself. Just be sure that you are going to fix it really carefully and follow instructions really well. Because if not, you might just make the damage further and you might just end up buying another one and then will make you spend more and you have wasted a lot of time trying fixing it.