Not sure, if it is Surface pro 4 but in the Surface app it shows Surface Pro 5th Gen.
Yesterday is noticed the overheating and suddenly i saw many touch points as circular dots in the screen due to which usb mouse and touchpad both stopped working. It seems that the touchscreen got frozen by these touch dots. (Image attached)
I shut it down using shortcut keys.
Re-started after a while, then everything found fine.
Worked for a while and again dots reappeared today.
I don't know if it is display problem or touchscreen drivers problem.
I hardly use touchscreen because i use a keyboard and mouse for all the tasks.