If your iPhone 6 or iPhone 6 Plus stopped responding to touch, you’re not alone. Many iPhone users are reporting the loss of touch combined with a strange flickering gray bar at the top of the display.
The problem has been around since the launch of the phone, but didn’t manifest until recently because the phones are getting older, according to a recent report from iFixit. It’s being called “Touch Disease” because it has become such a widespread problem.
iPhone 6 “Touch Disease” is said to stem from Apple’s design of its logic board for this particular phone. This board is home to most of the circuits that make your iPhone work, including the processor, storage, and touch controllers.
Over time, shock from normal use or drops slowly strain the connectors on the two integrated circuits (IC) that control touch on the iPhone 6 and 6 Plus. Once the ICs become disconnected, touch becomes intermittent or stops working completely, often accompanied by a gray flickering bar at the top of the screen.
So why is this happen only to the iPhone 6 and 6 Plus? Apple didn’t use a substance called “underfill” to help support the touch ICs, according to independent repair specialists like Jessa Jones of iPad Rehab and Louis RossmannThe reason we haven’t seen this in older handsets is because Apple has used in previous iPhone models.
This underfill works like a glue that helps mount the circuits to the board and also helps absorb impacts. Without this underfill, the touch circuits tend to flex and strain their connectors, eventually disconnecting from the logic board.
Additionally, Jones and Rossmann both point to the fact that Apple also decided not to put a metal shield over the touch circuits, which would have prevented the logic board from flexing. Instead, the company simply put a sticker over part of the iPhone 6 logic board where the touch controllers reside.
All of these factors, combined with the fact that the iPhone 6 and 6 Plus were prone to bending, has resulted in many iPhone users stuck with unresponsive phones.
The fix for gray flickering and unresponsive touch
Apple has yet to acknowledge the fact that Touch Disease is a known issue on its phones, leading to users seeking out independent repair shops to fix their phones. Since the iPhone 6 and 6 Plus are now out of warranty, Apple only offers customers the option to purchase a new phone.
Independent shops like iPad Rehab offer to fix the issue for less than what Apple charges for a new phone. iPad Rehab actually replaces the touch controller circuits with new ones and goes as far as to put their own metal shield around the circuits to prevent flex.
This problem is unique to the iPhone 6 and 6 Plus, as Apple has previously designed iPhones with rigid metal shields covering the entire logic board, like that found in the iPhone 5s. Apple’s current phones, the iPhone 6S and 6S Plus don’t suffer from this issue either, as Apple strengthened the weak points of the case and moved the touch controllers from the logic board to the display assembly, which is less prone to flex. It’s unknown why Apple decided not to put a metal shield over the iPhone 6 logic board.
Some users have “fixed” the issue by putting pressure on the screen so that the touch controllers would make contact with the logic board again. But this is only a temporary solution, as the touch circuits could be damaged, not just their connections.
The only foolproof solution for iPhone users plagued by Touch Disease is to buy a new phone or to reach out to independent repair shops to replace and reinforce the touch circuits, neither of which is an ideal solution.