7plus touch screen not working - GSM-Forum

Danial10 · 11-22-2018, 16:00

Hi

I have 7 plus and not working touch screen and beaten .

i changed with orginal lcd , but not working touch screen .

pls say way repair mainboard

Tnx

kunal124 · 11-22-2018, 16:28

Quote:

Originally Posted by Danial10

Hi

I have 7 plus and not working touch screen and beaten .

i changed with orginal lcd , but not working touch screen .

pls say way repair mainboard

Tnx

hello

did you check touch connector

is it in perfect way like pins and evevrything?

Danial10 · 11-23-2018, 07:58

I checked touch connector and no problem

i want same this video or Solutions this same way for repair :

But this video is for Iphone 7 and i need Iphone 7 PLUS

Tnx

Amanda0820 · 12-18-2018, 09:29

Hey! about iPhone 7 Plus touch screen not working, you can check whether the record icon is in function state.

There have some steps to repair iPhone 7 Plus touch screen not working as following:

1. Take out the logic board and tear off the shield sticker.

2. Apply some BGA paste flux around the audio IC and **** it with hot air gun at 300 degrees. Then take down the audio IC.

3. Dip some rosin with soldering iron to clean the tins. Then dip some rosin with Goot wick for secondary cleaning. After that, clean again with PCB cleaner.

4. Test resistance value of pin C12 (U3101 audio IC). The resistance value is swinging.

5. Roll out the maintenance drawing for reference. Locate the signal of pin C12: 12S-AP-TO-CODEC-MCLK. The signal was connected with CPU via resistor R1103.

6. Scrape the insulation varnish off the copper wire connecting pin C12 and resistor R1103. Solder tins and then solder the 0.02mm copper wire.

7. Apply some UV curable solder mast to the soldered copper wire and put the logic board under the UV dryer lamp for 15 minutes.

8. Reball the audio IC with BGA reballing stencil.

9. Apply some BGA paste flux to the bonding pad. Then align the audio IC to the right place and **** it with a hot air gun at 280 degrees.

10. Once the logic board is cooling enough, clean it with PCB cleaner.

11. Assemble the phone and test.

12. Touch function and record function back to normal.

kgnaccessories · 12-28-2018, 19:25

try to contact here on google search

kgn accessories

they will help you doing this

KaleyCuoco · 11-30-2020, 10:45

The problem is not simple. You should contact the Apple store for more support.

11-22-2018, 16:00	#1 (permalink)
Danial10 Junior Member Join Date: Aug 2018 Posts: 10 Member: 2861271 Status: Offline Thanks Meter: 3	7plus touch screen not working Hi I have 7 plus and not working touch screen and beaten . i changed with orginal lcd , but not working touch screen . pls say way repair mainboard Tnx

11-23-2018, 07:58	#3 (permalink)
Danial10 Junior Member Join Date: Aug 2018 Posts: 10 Member: 2861271 Status: Offline Thanks Meter: 3	I checked touch connector and no problem i want same this video or Solutions this same way for repair : But this video is for Iphone 7 and i need Iphone 7 PLUS Tnx

12-18-2018, 09:29	#4 (permalink)
Amanda0820 Freak Poster Join Date: Aug 2018 Location: China Posts: 158 Member: 2861866 Status: Offline Thanks Meter: 71	Hey! about iPhone 7 Plus touch screen not working, you can check whether the record icon is in function state. There have some steps to repair iPhone 7 Plus touch screen not working as following: 1. Take out the logic board and tear off the shield sticker. 2. Apply some BGA paste flux around the audio IC and ** it with hot air gun at 300 degrees. Then take down the audio IC. 3. Dip some rosin with soldering iron to clean the tins. Then dip some rosin with Goot wick for secondary cleaning. After that, clean again with PCB cleaner. 4. Test resistance value of pin C12 (U3101 audio IC). The resistance value is swinging. 5. Roll out the maintenance drawing for reference. Locate the signal of pin C12: 12S-AP-TO-CODEC-MCLK. The signal was connected with CPU via resistor R1103. 6. Scrape the insulation varnish off the copper wire connecting pin C12 and resistor R1103. Solder tins and then solder the 0.02mm copper wire. 7. Apply some UV curable solder mast to the soldered copper wire and put the logic board under the UV dryer lamp for 15 minutes. 8. Reball the audio IC with BGA reballing stencil. 9. Apply some BGA paste flux to the bonding pad. Then align the audio IC to the right place and ** it with a hot air gun at 280 degrees. 10. Once the logic board is cooling enough, clean it with PCB cleaner. 11. Assemble the phone and test. 12. Touch function and record function back to normal.

12-28-2018, 19:25	#5 (permalink)
kgnaccessories Junior Member Join Date: Dec 2018 Posts: 9 Member: 2885508 Status: Offline Thanks Meter: 1	try to contact here on google search kgn accessories they will help you doing this

11-30-2020, 10:45	#6 (permalink)
KaleyCuoco Junior Member Join Date: Jun 2018 Posts: 10 Member: 2846736 Status: Offline Thanks Meter: 0	The problem is not simple. You should contact the Apple store for more support.