My chromebooks touchscreen stopped working. I tried hard resetting it but after that it worked for about 30 mins and stopped working again. I tried factory reset and powerwashing but still nothing worked. i also tried turning the touchscreen on and off on chrome://flags/#ash-debug-shortcuts and the touchscreen worked again for a little while but again stopped working all together. Is this a hardware problem? Is there any other things to try? could this still possibly be a software issue?