Problem with touchscreen.

[null_and_void]

Hello everyone,
Today, i make a new thread, hope everyone can spend some minute to read and help my problem with my Nokia 525 touchscreen.
I have a 525 device, running windows phone 8.1 preview and working normaly. Unfortunately, i have fell it down to the ground (height is about 0,5m). After falling down, it is still working but my touchscreen has a problem.
When i text a message, i tap for a letter, but it jumps to other letter.
When i slide to browse my app list, although i dont choose any app it lauchs an app automatically.
When i play a game, Temple run 2 for example, at some scene, i can interact my touchscreen.
When the problem occur, i have to push my power button and push it again. The problem disappear for temporary, and the problem occur very soon after that.
I downloaded an app name "Hardware test", and chose "Touch" test.
Before test:

After test:

So, i cannot make the blank line change to blue lines. Is my touchscreen have been damage when it fell down?
I brough my phone to Nokia Care, and they just downgraded my phone to 8.0 (Black version), but cannot change anything.
I need some suggestions from everyone, how can i deal with this problem?
I'm appriciated with your help and sorry if my English is bad.

 

[Dennis Bakker]

It looks like a damaged touch screen. My sister had the same, but with a new phone. Her phone started apps or typed letters in random. I think you should contact Nokia and let them repair your phone if you still have warranty...