iPhoneの第4代目で、修理はそのままパーツを直接交換するだけです。しかし、正面ガラスとLCDはセットで交換する必要があります。容量はGSM / 8,、16m32 GB / モデル番号 A1332 /本体カラーは黒と白色

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Short circuit? REALLY need help!

Hello everyone,

I've been trying to put a new screen on my iPhone 4, but during the process something terrible happend. My iPhone wouldnt start anymore so I removed my battery. I noticed an screw underneath my battery..

Did my iPhone short circuit? Cause it won't fireup anymore:S

Is there any else I can do? I tried the battery of my girlfriends iphone, but that didnt work either!

Please help!


I inserted my battery charger and I hear the sound of charging.. whats wrong?:P

Could it be my LCD screen?

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It sounds like it starts up, but the backlight IC or filters are bad. This usually happens if you do not turn the phone off or do not disconnect the battery when you work on it.

Check for a image with a flashlight. If this shows something the backlight IC or screen is bad. Easiest way to tell is fit the old screen to see. If it works, it's the screen. If not, it's the backlight IC or fuse.

The problem here is so many people blame the coil, everyone is selling the coil. It's not exactly easy to find the IC or filters. Very few people sell them because everyone wants to think it's the coil. If the board is bad, this will require some serious searching.

Here's a guide on motherboard removal to check. Look for visual hints and have a multimeter and schematic ready. They can look fine, but are still bad. They don't always release the magic smoke when they die. Replace any damaged or shorted parts. You may need to remove the RF shields too. Many parts are hidden there.

iPhone 4 のロジックボードの交換


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Thanks, so basically try my old screen assembly? :)


Mother of god. This was my first iPhone assembly/reassembly. So I kinda cried when you were talking about soldering. Luckly, the phone works! With old screen though.. what could have happend? The new LCD short circuited? Cause why didnt the backlight work? When I powered on I saw no lighting at all.. Or maybe the LCD was delivered with flaws.

Thanks Nick


Yeah, sounds like it was DOA or shorted, it's really a tough call as to which happened


try contacting the company you bought the screen from..if there is no evidence of damage to the flex cable or pins then maybe you have received a dud screen. A lot of companies are now testing all screens before shipping as people tend to crimp or damage the flex in installation and then claim a damaged screen was sent out. You need to check the returns policy and fine print..


I sent an e-mail to the guy and he told me he tested them before they ship. I said I didn't know what happend, but I haven't seen it turn on and after replacing my old one it did work. I said I'm not stating its damaged, but possibly could be damaged. He said it's okay, since I ordered there a few parts before. He sent me a new screen and I've to send the old one back. Clearly got lucky there. Thanks for the help guys.



Try a reset, press the top and and home button at the same time, if that doesnt work then disconect tand connect the lcd.

If non of those help, it could be a deffective or damaged lcd, test new screen before putting it back together.

If your phone is off, dont worry about it because it can still be fixed


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my phone is damages by salty water and its not working may be its shot pls suggest me is my iphone is repared?


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Mittchel さん、ありがとうございました!

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