HTC Sensation xe screen help please

Hasnan Islam

hi my htc sensation fell on the floor and and screen cracked, so took it to mobile shop they put new lcd and touchpad the problem is that it works fine for a while but then the screen gets crazy and starts touching itself and starts seleting stuff itself and the screen does not respond then i have to take my battery out.

What could the problem be is can it be the motherboard ?

can somebody give me advice thank you

If you can take it back to the place that fixed it, I would do that first. Is that possible?