My Xiaomi Redmi 3s's old screen was broken so I imported a new LCD+Touch-screen with frame from china. After fixing the new LCD, the touch screen(LCD is working perfectly) is not working but the surprising thing is the touch screen of the new LCD is working only when the phone is connected to a charger! When I unplug the charger the touch screen stops working. any Idea why its happening? hope someone could help me.

  • You've most likely got a capacitive touchscreen. It could be that the cable is not properly seated, damaged, or defective, or another part could've been damaged when your old screen was broken. Try re-seating the cable and make sure it's well connected. A voltage tester may be able to tell if the screen itself is defective, but I've never used that stuff so I'm not 100% sure it would be safe and if you want to go that route please wait for someone more knowledgeable to say if it would be okay. – l3l_aze Sep 2 '18 at 5:42
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    Thanks for the reply. I have tried reconnecting the flex cable 3 or 4 times to make sure the cable is attached perfectly to the motherboard. Still the touch screen only works when the mobile is on charger! – user9949764 Sep 2 '18 at 6:51
  • No problem; I'm sorry it wasn't more helpful. There was (is?) apparently an issue with the Galaxy S6 like this which could be fixed by clearing the system cache. This should be perfectly safe to do, and may also make your device run better in the process...provided it fixes the touchscreen issue, lol. If that fails try editing to include your device, OS version, and some other info (but not MSN/ESN/MEID which are personal AFAIK; only hardware & software versions). – l3l_aze Sep 2 '18 at 7:55
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    I will try clearing the cache. also will update the query with device details. thank you – user9949764 Sep 2 '18 at 8:05
  • I have done factory reset when connected to the charger(touch screen works when charger is connected), do I need to do a seperate cache cleaning? The touch screen still not working without the charger! – user9949764 Sep 5 '18 at 9:41

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