Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 16 or 32 GB capacity / black or white plastic back.

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Dim display after attempted replacement :( any ideas?

I was trying to help out a friend with a cracked screen, and after about 10 minutes of tinkering I thought to check the model number on the scrap iPhone that I was using for parts- turns out that the old model was a 3G and the new one is a 3GS, which don't have compatible screen/LCD assemblies. I was trying to put the 1 2 and 3 connections back together with the 'new' (non-cracked) screen, and I'm afraid I damaged a connection somewhere. Now when I put the old cracked screen back together, the display is extremely dim and won't get brighter through 'Settings'. She already tried to reset her phone through iTunes. If I can't fix it I'm going to replace the screen out of my pocket, but I would love to not do that. Any ideas, iFix-ers?

THank you!!

Experience: I have performed this repair successfully multiple times previously, and am fairly comfortable within the guts of a iPhone.

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unfortunately the 3gs is extremely doesn't like the wrong LCD or having connectors put on when power is on.. the most common thing it will do is blow the backlight! its a coil 6r8(located in top left of board under the metal cover) it can be bought for about £5 on ebay, and is easy enough and accessible that you can solder it yourself.. there are some good guides on youtube. You could try cleaning the connector 1 or inspecting for dirt and debris/bent pin seeing as the 3g connector is smaller it may have damaged something. There is also a cheat of connecting a small wire from the coil to bottom right pin but it isn't the best option as it bypasses the fuses and you are likely to damage more with this fix

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