iPhone screen black after tiny bit of water damage on top of phone.

From your description, you have a back light issue. This is very common with liquid damage as this is where most of the power in a phone runs (ie. 20-22v).

You most likely have a blown back light filter, although it could be other parts of the back light system (back light driver, LCD/screen connector, or the actual back light attached to the back of the screen assembly).

Water damage is always a bit of an unknown. Even if you were able to have a repairer fix the back light issue, it may show other problems which you can't currently see.

If you have no concern for the data on your phone, then Apple's out of warranty exchange is your best bet.

If you wish to retrieve data, then you can take it to an independent repairer who has a good reputation for liquid damage and data recovery. Opening your device may void any post warranty support from apple.

What is a bit? Usually a bit of water, like rain drops don't break your iPhone or your phone's display. Pictures or a video would be helpful so we can see it in action.

If you cannot reject that a bit of water got inside the phone it can help turning it off and put it in a glass filled with rice. Than wait 2 - 3 days and try it again. But if there already is an electrical damage this can not help you.

Unfortunately iPhone is not waterproof. You are lucky one if it still works after contact with water. Usually phones and water do not mix and water damage is not covered by warranty. Corrosion has already started. You should schedule a genius appointment at the Apple Store to appraise the level of damages. They will offer you the best solution.

I see. I guess you must accept the repair costs. £200 is less than a new iPhone. I know how hard it is, but you are a lucky one: The phone is still working.

But if he really saves money? But a good point. Make a local iTunes backup before bringing it to repair. If you have iCloud backup activated, than you are already good to go.

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