Changing motherboards

[paulus29]

Hi peoples, I have a galaxy-s4, recently I cracked the glass, I able to buy the glass on ebay and install myself, all good. I recently installed a new nougat rom, however it took up most of my 8gb internal space. So I bought another s4 '16gb'that's had a broken screen, tried to replace glass unfortunately I cracked the digitiser. So I removed the 16gb motherboard and installed it on my original s4. NOW THERE'S A PROBLEM. Sometimes the display does its own thing, things seem to jump all over the place, non stop, I have to keep tapping the screen for it to stop. Also when typing something, when I try to scroll the the text, it does the thing of scrolling itself, the only way to stop it is to tap the screen. HELP IS DESPERATELY NEEDED PLEASE. THANKS

 

[Bg260]

Check your ribbon connection to the digitizer. You can clean it with a tiny bit of alcohol if you want.

 

[paulus29]

Thanks I'll try that, do you thinks the new motherboard is causing conflict? I put a new rom on it after I installed it.

 

[Bg260]

It shouldn't matter. Sounds like the problem is hardware. Bad connection.