REWA Tech

Tag: ipad ghost touch

How to Fix iPad Touch Screen Jumping/Glitching – Touch IC Replacement

Today we will share how to repair iPad touch screen jumping. The touch screen of the iPad is still jumping after touch screen replacement.

It can be preliminarily judged that the problem is caused by a motherboard fault. Next, we need to check the motherboard. Detach the touch screen and display.

Remove the screw on the motherboard and insert a Pry Piece to disconnect the battery. Measure diode values of the two connectors with diode mode of the multimeter. The diode values are normal. It indicates that the circuit connecting the touch connectors to the touch IC is normal.

Then we try to replace the touch IC. Remove the shielding cover on the motherboard. Since there is another soldered shielding cover on the touch IC, we need to grind the shielding cover and then heat to remove. Grind the shielding cover with a Grinding Pen. Please pay attention not to damage surrounding components while grinding.

Tear off the tape after grinding. Disconnect the flex cable. To prevent hard desoldering due to fast heat dissipation, pry up the motherboard with a metal blade.

Protect nearby components with high-temperature tape. Apply some Paste Flux. Remove the shielding cover with QUICK 861D Hot Air Gun at 400 °C and airflow 45.

Apply some Paste Flux around the touch IC. Keep heating to remove the Touch IC. Apply some middle-temperature Solder Paste to the bonding pads with Soldering Iron at 365 °C.

Add heat with Hot Air Gun to clean the bonding pads. Keep cleaning the bonding pads with Solder Wick. Clean the bonding pads with PCB Cleaner.

Apply some Paste Flux. Put a new touch IC in position. Heat with Hot Air Gun to solder.

After the motherboard has cooled, remove the high-temperature tape. Connect the flex cable. Install the screw. Then install the touch screen and display. Turn on the iPad. The touch screen has returned to normal. The touch jumping problem has disappeared.

September 23, 2021
iPad Air Ghost Touch? Learn Why and How to Solve It

You may have observed that your iPad has been acting strangely, especially if you have replaced the iPad screen recently.

Similarly, this is also a headache for many repair shops.

For S+ grade iPad Air touch screen digitizer, iPad ghost touch is a problem occurs quite often as follow, touch function works well before assembling, but some malfunctions spring up after assembled, like screen flicking and unstable touch.

How to solve this problem?

Here we have the reason and solution.

Reason

What causes the ghost touch on your iPad devices?

There is a layer of electronic circuit exposed on the surface of S+ grade iPad Air touch screen digitizer, and also a layer of conductive adhesive tape stuck along the four sides of LCD display.

When installing the touch screen digitizer to the LCD, it will cause short-circuit, which acted as screen flicking and unstable touch.

For the OEM touch screen digitizer, however, there is a piece of film covered on the surface, thus it will avoid the occurring of the above problems.

Solutions

The solutions to this problem are quite easy.

1. Paste tape on the four sides of the iPad digitizer to protect the exposed electronic circuit from touching the conductive adhesive directly.

Please take care of the flex cable when pasting.

2. Paste a layer of foam on the four sides of the LCD display to avoid direct contact between the LCD display and digitizer touch screen.

If you experience ghost touching on your iPad Air, it would be better to take it to a repair shop.

March 3, 2017

Tag: ipad ghost touch

How to Fix iPad Touch Screen Jumping/Glitching – Touch IC Replacement

iPad Air Ghost Touch? Learn Why and How to Solve It

Reason

Solutions