If there are any clearly damaged components, see our other iPhone guides for instructions on replacing specific components.
If the problem seems to stem from a single board component or chip, a skilled microsoldering technician may be able to repair the damage.
If you can't find the source of the problem, it's possible that components under the EMI shields have been damaged. Contact a repair professional to de-solder the shields and give the board an ultrasonic cleaning bath.
If everything is working, congratulations! Go ahead and reassemble your phone.
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