Issue # 1: iPhone does not turn on and now has a black or
white screen
Explanation: This is normally a software calibration issue.
Blank and white screens are usually a sign of the internal
software not wanting to accept the new parts.
Video Guide: https://www.youtube.com/watch?v=VWto8X81PRI
Troubleshoot Steps A:
Do a soft reset by pressing both the home and power button for 15
seconds. A soft reset will clear your device of
any temporary data that is blocking your new part from working.
Troubleshoot Steps B:
1.
If step A does not work, try disconnecting the battery connection and holding the power button down for twenty second. Then reattach the battery and hold down the power button.
2.
If steps above don't work, try to reseat the battery again with steps below.
A.
Re-seat the battery connector and the connectors for the LCD or Digitizer.
B.
When reconnecting the cables back onto the board, ensure that the pins
align properly and that you get a tactile click when reconnecting.
C.
Reconnect all connectors for the screen.
D.
Lastly, connect the battery connector. Close everything up and power on
the device.
Things to Note:
·
Check to see if your screens’ back light is on.
·
If there is no back light in addition to no display, your new LCD
is not plugged in correctly.
·
Reattempt the repair and make certain your new part is fully
installed.
Troubleshoot Steps C:
Follow link to How to do force restart if your screen is black or frozen
Issue #2: If your digitizer is unresponsive and does
not detect touch on the screen
1.
Reattempt
the repair
2.
Make
sure that the flex cable is not the damaged, torn or crimped (excessively folded).
Note: Crimping causes micro
fracturs in the think metal inside a flex cable. Once this metal is cracked,
power and other impulses cannot flow through the device.
Issue #3: If only a select grid of icons will not
work such as the top third, or left side
Explanation: You may have a cable that is miss aligned.
Troubleshoot Steps:
1.
Open
your device and make certain that all the connectors on the flex cable match
up.
2.
If
this plug is off center, you will see a “blocking” problem.
Note: Blocking can happen if
either your digitizer cable or motherboard have missing or bent pins.
3.
The
missing or bent pins will need to be put back into place before your device can
continue working again.
Issue #4: Stress marks on your device shows yellow
discolorations or ink like blotches on your display (commonly near the edges)
Explanation: Stress marks is a potential sign that too much
pressure has been applied to the LCD during the repair process.
Troubleshoot Steps A:
1.
Open your device and make certain that there is no residual glass form
your original broken screen.
2.
After clearing your screen, disable your phone’s “sleep mode” and leave
your device on a charge for 24 hours.
Note: The heat from a constant charge can
cause the crystals inside your device to move back into place.
Troubleshoot Steps B:
1.
If step A does not resolve the problem, do the following steps
Note: Stress marks can be the result
of the pressure that is applied from placing your finger directly on the back
of the LCD screen, during the repair process.
2.
Remove the LCD assembly
3.
Thoroughly clean the metal frame from all glass, glue, and tape.
Note: Possible residual 3M tape or
glue will need to be removed before attempting reinstallation process. Any
residue is interfering with proper electrical connections
4.
Re-process installation
Issue #5: Your device is showing blue or black bars.
Explanation: This is normally a sign of your LCD cable not
being plugged in correctly.
Troubleshoot Steps:
1.
Re-attempt the repair process from the beginning.
2.
At the point where you plug in your new screen to your main board, check
both your connector plugs, and verify that none of the pins are bent or
missing.
3.
If the pins are damaged, plugging in your new screen again will not
solve the problem.
4.
You will need to bend the pins back into place before your device will
start working again.
5.
Once the pins are straight, and the screen is plugged in again, try
powering on your device without closing it up.
Note: This will allow you to
troubleshoot your repair without the need to remove every screw all over again.
Issue #6: If your device is showing no image, but
there is a glow from the back light
Explanation: This is normally a sign of your LCD cable not
being plugged in correctly.
Troubleshoot Steps:
1.
Unplug
your screen & battery
2.
Re-
plug your screen.
3.
Plug
your device into iTunes (see if you have an image).
4.
If
an image appears, unplug your device from iTunes.
5.
Plug
your battery back in.
6.
Turn
your device on using the power button.
Issue #7: If your device is showing no image, but
there is a glow from the back light and have tried all steps for issue 5 &
6. You may have a battery that is dead or dying
Explanation: Current battery is no longer sending a
strong enough charge to your phone to allow the screen to make an image appear.
You will need to replace your battery.
Things to Note:
·
Should an image appear on your phone, you are ready to go.
Issue #8: (iPhone 6 specific) The digitizer is working intermittently.
The display is flickering or is experiencing multi-touch issues.
Explanation: In the past, customers has reported that iPhone
6 Plus, and some iPhone 6, has a problem called Touch Disease (see apple class
action lawsuit). The “touch disease” is a gray flickering bar with touch screen
responsiveness problems. It often happens after phone has been dropped.
Things to Note:
Apple Website:
https://www.lifewire.com/iphone-touch-disease-4120914
·
Please refer to the warranty on your device and consult with an
Apple Genius at the apple store
Issue #9: When the screen is mounted onto the iPhone,
the screen displays two black vertical lines and disappears once taken off.
Explanation: Lines are normally caused when the LCD cable is
not correctly aligned in or some dust is trapped in the connectors themselves.
Troubleshoot Steps:
1.
Remove the LCD Screen and clean the connectors
Things to Note:
·
If the troubleshooting does not work or if your screen still
displays vertical lines, you may have a defective or broken part.
Issue #10: Sometimes the screen is unresponsive or
lags
Troubleshoot Steps A:
1.
Since
the issue occurs intermittently, check if the phone software is causing this
issue.
2.
Back
up your phone data then restore your device.
3.
Make
sure to setup your phone as a new device.
4.
Once
this is done check the swipe functionality and see if the issue still occurs.
5.
If
it doesn’t then it was probably caused by a software glitch. You can now
restore your data to your phone.
Troubleshoot Steps B:
1.
If
the same issue occurs after restoring your phone, this may be a hardware
related issue.
Note: This may be caused by a
loose connection perhaps.
2.
You
need to open your phone again and retrace the steps you took during the repair
process.
Issue #11: What to do if the battery replacement is not
holding a charge
Troubleshoot Steps:
1.
Check
your battery status on your phone
On you phone Settings > select battery
2.
Close
any apps that are running in the background
that are consuming too much power
3.
Check
background app activity> in setting go to General and Background App
Refresh.
4.
Here
you can check to see which apps are running in the background and check to see
percentage of usage by app.
5.
To
save battery life, you can either turn off background app and refresh all
together
6.
After
having done step 1 and 2, you still experiencing fast battery drain you may
need to calibrate the battery.
7.
Calibrating a battery is easy. Let your Phone’s battery drop to 0% and until it shuts off automatically. Then let it
charge uninterrupted back to 100%
To confirm that the backlight is no longer working, disconnect the battery, reconnect it, then plug in a USB lightning cable. Immediately shine a bright light on the center the screen and you should be able to see a faint apple logo. That will confirm that there is a problem.
This can happen if the iPhone is not turned off or the battery is not disconnect before starting repair. With the iPhone 6s and the iPhone 6s Plus the Backlight Circuit still receives power when the phone is powered off so you have to disconnect the battery as well.
To resolve, you will need to replace the Backlight Circuit or the complete LCD.