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The first model of iPhone, Model A1203 with 4, 8, or 16 GB capacity and an aluminum back. Repair requires a significant amount of prying, and may require some soldering. This page aims to help users troubleshoot, fix, and seek help for the iPhone 2G.

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2g iPhone battery was replaced now boot screens tuns on and off.

Replaced the battery in my 2g now the screen boots then shuts off why?

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I have the same problem here,

I read a lot for the solution, some of them said that we need to replace the battery or clean up the charging port from debris.

Hope its help.

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I'd agree with nio. common mistake when replacing a battery is poor soldering/contacts. resolder the battery contacts and see what happens. Iphone reboots as there isn't enough power from battery to launch. Plugging in to itunes may give a restore error 21.

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