Released September 25, 2015. Model A1688/A1633. Repair of this device is similar to previous generations, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 64, or 128 GB / Silver, Gold, Space Gray, or Rose Gold options.

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AP_TO_LCM_RESET shorted, no image no backlight.

AP_TO_LCM_RESET shorted on iPhone 6s. Phone is recognised by iTunes when plugged into a computer. Im getting no image & no backlight. Ive done a bit of research on this from the limited information available and it seems as though it is looking like a no fix.

Has anybody had this issue before and had any luck solving it?

Cheers

Answered! View the answer I have this problem too

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GIVE TOOLS. FIX FOREVER.

GIVE TOOLS.

FIX FOREVER.

Spread the Fixmas cheer.

GIVE TOOLS. FIX FOREVER.

Spread the Fixmas cheer.

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Chosen Solution

Update : So i removed the CPU (begrudgingly) and the Short on AP_TO_LCM_RESET has now gone!! Re-Balled & Re-fitted the CPU and now have a working phone!!

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Great! Was that your first CPU reball?

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It was my first successful one!! :)

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good job @glenpy

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Most Helpful Answer

It's highly unlikely that R4220 is shorted. The fact that you removed it and the short was still there would lead me to believe that C4221 is the culprit here. Remove that cap to see if the short goes away. If it doesn't, then check the connector to make sure there are no issues there before calling it a no fix...unless you enjoy removing CPU's :>).

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haha its not a strong passion of mine :) but i might give it a go for educational purposes lol i removed C4221, the Filter and the resistor on that line and the short is still there. Ive already changed the connector and removed a shorted cap from the 5V7 line.

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have you checked around fl4221 i had a 6s with no image and backlight and there was a short in that area

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Hi Dan,

FL4221 seems ok and isn't shorted, R4220 is shorted. I have removed R4220 and the short still exists which i think means the short is either in the CPU or in the trace to the CPU.

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try removing c4221 to see if the short is gone

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i would take the filter off aswell

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Short still exists with all three removed :(

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Glen Fitchett will be eternally grateful.
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