The Apple iPhone 5s was announced on September 10, 2013. Repair of this device is similar to the previous models, and requires screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Silver, Gold, and Space Gray.

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After replacing battery screen doesn't work, It shows faint grid lines

After redoing twice the whole step by step I did to add the new battery, the screen is still unresponsive. I can see a faint grid lines and both slides to "UNLOCK" and "POWER OFF" don't work.

What can I do next to fix this unexpected problem?

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What color are the lines? If they're grey/white it's a sign of a poor connection and/or ESD damage. You'll want to power off the device (hold the power + home button simultaneously) and then disconnect the battery, followed by the screen. Take a q-tip (dipped in Isopropyl Alcohol if possible) and clean the connectors on the board for the screen and on the part. Let dry completely (this goes faster with >91% purity alcohol) and then inspect for any debris in the port(s). Plug in the screen, then the battery, and then power on the device.

Lines should be gone but if they are not you may try letting the device sit, disassembled for about an hour or two for the static to discharge.

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