Help with touch calibraion galaxy s4 i337 - GSM-Forum

nortnil · 11-17-2013, 02:32

I am having trouble with the touch input on an AT&T Galaxy S4 i337 LCD. The phone had minor water damage and the LCD was struggling to turn on all the way. After soaking the LCD assembly in an ultrasonic cleaner for 15 minutes the screen fully loaded and displayed correctly.

However all but the top quarter inch of the screen is recognizing touch input. I have tried the LCD with a known working motherboard and get the same result. When I go into the test mode by pressing *#0*# every part of the screen responds correctly, except the very top portion. When I swipe across the top the line is drawn 1/4" down.

Otherwise the screen works wonderfully, displays correctly (including the top 1/4"), dims correctly, and accepts touch input everywhere else.

I tried running it through another ultrasonic bath, but I am still having the same problem.

Does anyone know what could be the cause of the digitizer not recognizing just the very top portion of the screen? It is like the phone has just a slightly shorter resolution according to the digitizer.

nortnil · 11-18-2013, 00:36

I tried to link to a screenshot of the Touch test, but I don't have enough posts to submit a link. It is and I M G U R upload e8Xk2p1

11-17-2013, 02:32	#1 (permalink)
nortnil Junior Member Join Date: Nov 2013 Posts: 2 Member: 2066943 Status: Offline Thanks Meter: 0	Help with touch calibraion galaxy s4 i337 I am having trouble with the touch input on an AT&T Galaxy S4 i337 LCD. The phone had minor water damage and the LCD was struggling to turn on all the way. After soaking the LCD assembly in an ultrasonic cleaner for 15 minutes the screen fully loaded and displayed correctly. However all but the top quarter inch of the screen is recognizing touch input. I have tried the LCD with a known working motherboard and get the same result. When I go into the test mode by pressing #0# every part of the screen responds correctly, except the very top portion. When I swipe across the top the line is drawn 1/4" down. Otherwise the screen works wonderfully, displays correctly (including the top 1/4"), dims correctly, and accepts touch input everywhere else. I tried running it through another ultrasonic bath, but I am still having the same problem. Does anyone know what could be the cause of the digitizer not recognizing just the very top portion of the screen? It is like the phone has just a slightly shorter resolution according to the digitizer.

11-18-2013, 00:36	#2 (permalink)
nortnil Junior Member Join Date: Nov 2013 Posts: 2 Member: 2066943 Status: Offline Thanks Meter: 0	I tried to link to a screenshot of the Touch test, but I don't have enough posts to submit a link. It is and I M G U R upload e8Xk2p1