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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Why is my screen dim?

Hello

I recently repaired an iPhone 3GS. When I had connected the last of the ribbon cables, i turned the phone on. It worked, but it was extremely dim (practically black). I managed to make it to settings and adjust the brightness, but neither sliding it all the way up or all the way down had any effect. Then, when i disconnected the display and tried to connect it again, nothing was displayed at all! What could this be?

I was replacing both the LCD and the glass.

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It sounds to me like a backlight issue. What were you originally repairing on it?

First, double-check the connectors.

Then, I would replace the Display first. If this does not fix the problem, signs point to the logic board, unfortunately.

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it could be a bad lcd chip on the logic board. it happens a lot with liquid damaged phones. if a new lcd does not work then i would believe the chip would need to be replaced. no guarantee. it's extremely difficult to solder something that small, but we're champs at it here.

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I think you can check the 6R8 coil,most of the backlight issue was caused by this item

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Same issue I got.Only difference is My LCD is still working with only exception of very dim screen. Any fix to this issue? Please let us know if you got it fixed.

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