1. The touch screen could be faulty. Screen replacements are manufactured by third party companies and sometimes their integrity could not be meeting the standards. For instance, you can get a screen replacement part being manufactured in India when the phone’s company is located, say, in the US.
2. The flex cable is not rightly in contact with the connector. This implies that the signals from the screen won’t be conveyed to the phone.
3. The same flex cable could have been damaged during the reassembly process. This gives people a lot of headache since the torn part could not be visible sometimes.
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For detailed solutions please check here:
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[http://www.hcqs.us/blog/fix-iphone-6-touch-id-not-work-after-screen-replacement/|How to Fix iPhone 6 Touch ID Not Work After Screen Replacement]
There are 3 possible reasons for the problem:
1. The touch screen could be faulty. Screen replacements are manufactured by third party companies and sometimes their integrity could not be meeting the standards. For instance, you can get a screen replacement part being manufactured in India when the phone’s company is located, say, in the US.
2. The flex cable is not rightly in contact with the connector. This implies that the signals from the screen won’t be conveyed to the phone.
3. The same flex cable could have been damaged during the reassembly process. This gives people a lot of headache since the torn part could not be visible sometimes.
For detailed solutions please check here:
[http://www.hcqs.us/blog/fix-iphone-6-touch-id-not-work-after-screen-replacement/|How to Fix iPhone 6 Touch ID Not Work After Screen Replacement]