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iPhone Logic Board Repairs | What's the deal?

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iPhone Logic Board Repairs | What's the deal?

The main board in your iPhone is made up of different controllers that undertake various major functions of your device. Unfortunately, these controllers, known as integrated chips or ICs can fail and stop working. The cause and frequency of failure is unique to each iPhone and usually comes down to the way they were designed and manufactured, the environment they have been used or the damage they have sustained.
We will list and give you a brief description of these issues and which phones they are commonly found on.

iPhone Logic Board Faults - celltech blog

 

Touch Disease - Commonly on iPhone 6 and 6 Plus

Cause:

The iPhone 6 Plus owing to its bigger size, bigger main board and lower grade aluminium housing is easily prone to bending whilst being carried in the back pocket. The Touch IC is a big square component on the main board which can lift away from the main board at one corner.

Effect:

  • The screen no longer responds to your touch;
  • There is a checker box pattern along the top of your display.
  • Still no touch functionality after a screen replacement.

Solution:

The Touch IC needs to be re-flowed or replaced.

 

No Audio - Commonly on iPhone 7

Cause:

The phone has taken physical damage, sometimes normal wear and tear.

Effect:

  • No sound when playing video;
  • The loudspeaker icon being greyed out during a call;
  • No sound from the earpiece while on a call
  • Your microphone doesn't work whether using voice memos or on a call.

Solution:

The Sound IC needs to be replaced on the main-board.

 

Power Management

Cause:

Can be caused by normal use over time. Using a non-genuine charging plug over an extended period. Also by leaving the phone on charge even when it has reached its 100 percent charge capacity.

Effect:

  • Your iPhone loses it charge rapidly;
  • The wrong battery percentage is displayed;
  • The phone continues to lose charge quickly even after a battery replacement.

Solution:

The Power Management IC on the main-board needs to be replaced.

 

Not Charging Properly

Cause:

Using a non-genuine plug or charger. Normal wear and tear on the device.

Effect:

  • Your iPhone charges while it is switched off, but not when it switches on;
  • Only certain charging leads charge your iPhone, notably only non-genuine cables.

Solution:

The Charging IC needs to be replaced.

 

No Backlight or Display

Cause:

When the phone has taken physical damage. Water damage is also a big cause for backlight failure.

Effect:

  • You have no display but can still hear the phone working as normal;
  • The display is very dim and not usable;
  • The problem persists even after a screen replacement.

Solution:

The backlight filter or the backlight IC needs to be replaced.

 

Conclusion

There are a number of POF (points of failure) on any phone, either component level, main-board level or software related.

It is always advisable to visit a good repair centre that will honestly diagnose your device and advise you accordingly, instead of trying to charge you for a repair you don't need doing.

If you have any questions about your device or some of the above symptoms are something you are experiencing then feel free to send us an enquiry or visit us in-store for honest advise.