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Repair information and guides for the iPhone 6 that was released on September 19, 2014. Model Numbers: A1549, A1586, and A1589

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iPhone 6 touch no working

Hi friends I hope you all go well

I have an iphone 6 that is falling into water

I desoxidation

The phone turns on but the touch does not work anymore

In your opinion which is damaged

Black ic touch (U2402)

White ic touch (U2401)

Answered! View the answer I have this problem too

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hi thinks for the rep

for test all circut

i use multimeter in continuity mod ???

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Was there any obvious corrosion around one of the IC's that would lead you to believe that one or other was more likely to be bad? Was there a lot of corrosion near the LCD/Digitizer FPC connectors? Sometimes the whereabouts of the corrosion can give you clues as to what part of the board to focus on first.

Otherwise, I would start at the "end" of the circuit and work my way back before swapping out IC's. Remember that changing IC's requires massive amounts of heat; there's always a risk of secondary damage.

  • Check the Digitizer and LCD FPC connectors on both the logic board and the screen. Some times there is a pin or two that get so corroded they do not make electrical contact anymore.
  • The check the filters and capacitors on LCM_TO_AP_HIFA_BSYNC_CONN, TOUCH_TO_SAGE_VCM_IN_CONN, PP_SAGE_LX and PN_SAGE_TO_TOUCH_VCPL_FILT.
  • Then check the voltage rails supplying the Touch circuitry PP5V1_GRAPE_VDDH, PP1V8_GRAPE, PN5V7_SAGE_AVDDN, PP5V7_SAGE_AVDDH and PP1V8

Once you have determined that there is no problems with the peripheral circuitry, I would start with Meson (Black) first, see if Touch returns and then try Cumulus (white).

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hi thinks for the rep

for test all circut

i use multimeter in continuity mod ???

by

When testing filters, check to see if they are open-circuit (they shouldn't). when testing voltage rails, first check to see if they are shorted (they shouldn't) then test under power to see if the proper voltage is present.

If you found this answer helpful, please select "Was this answer helpful? - YES" and/or if this answer solved your problem, please “Choose as Solution”. This allows people in the future to understand which answers helped solve the problem and adds value to the site. - Thanks

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Frankly I'm lost minho

I can not even test all the condensers

I'm lost you would have a tuto or other thanks minho

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Why can't you test the capacitors?

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To test capacitors I must remove the u2401 and u2402

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i have the same problem, but i didn’t found PP5V1_GRAPE_VDDH and 1v8GRAPE tension.. and TOUCH_TO_SAGE_VCM_IN_CONN in multimeter diode mode is 988,

where would have to be open line, sure? what i do now?

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Mike Plouvin will be eternally grateful.
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