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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 randomly shuts off while unplugged (could it be tristar?)

Hi everyone,

Today we have an iphone 6 with ios 11.2.5. Long story short i was checking my old logic boards and this one gave me a restore mode display i took my change and plugged it to itunes and voila it started to purr again or i was thinking like that.

But then whenever unplugged the phone after screen go dark, it shuts itself off and start to bootloop. So as usual i tried with NEW battery same, couple different screens same, NEW front camera and same. When i put on charge sometimes turn on sometimes bootloop but with computer always turns on which is weird. anyways I checked with 3utools for battery life and it has good voltage and amperage, so looks good. But when i checked battery connector lines on logic board with my multi meter continuity mode shows 1600-1670. Could tristar chip started to failing or something like short?

BTW all front components are Chinese 3rd party parts screen, camera flex, and home button and also battery too.

Answer this question I have this problem too

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take a look at microsoldering.com there are answers about tristar

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Thanks for the site.

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Sounds like tristar needing replacement. Definitely going to need board level repair at least for this issue.

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Thanks Ben, for your answer, i was thinking the same. I ll change tristar and will update here.

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chuck Col will be eternally grateful.
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