Recently I was facing this problem, that I could not charge my iPhone 5 (Black, ios 7.1.4). I lost my original cable so I bought a cheap one thinking it would charge my iPhone until I get the original one. But I could not charge it with the cheap cable. I did a research about it in online forums but found other people facing the same problem. After few days stumbled upon the site called "http://www.iphonehacks.com". It is my favorite site to know more about iPhone and iPhone hacks. And I came to know the cheap cable does not work instead it damages the other internal part of iPhone that could entirely damage the iPhone and make possibly unrepairable.
More information is down below:
Battery issues aren’t new to the mobile industry, and sometimes it can feel like no matter what you do, your phone just doesn’t want to charge. A new report suggests that third-party cables could be the reason your iPhone 5 won’t come back to life.
According to mendmyi, which has been replacing batteries in previously dead-and-won’t-turn-back-on iPhones 5′s, the reason they’re not coming back on after being completely depleted is the third-party, cheaper cables, which are apparently damaging an internal component within the device. Indeed, mendmyi was seeing devices they had fixed plagued with the same issue, even after a battery replacement.
After some investigating, mendmyi was able to narrow down the issue, and found that it’s centered around a part called the U2 IC chip. This particular piece controls quite a bit, including the charge to the battery, the sleep/wake button, and regulates the charging to the power IC that ultimately charges the iPhone 5. The U2 IC is fitted to the logic board with 36 pins, and mendmyi says replacing that particular piece is quite involved.
From mendmyi:
“Charging your iPhone using a third party charger or USB lead that does not regulate this as much allows for larger variables in voltage and current, this then damages the U2 IC and can leave you with a seemingly dead iPhone 5. Another common reason for this is also charging your iPhone 5 from the cigarette lighter of your car. This does not regulate the voltage as well as the original AC adapter as the power is coming from the alternator. If you need to charge our iPhone or any electrical equipment in your car we would recommend a good quality inverter with your original charger and USB lead.”
Having a phone that won’t charge or turn on is one thing, but knowing that there’s a piece inside that’s broken and preventing it from turning on is an entirely different frustration. But, knowing is half the battle, both when it comes to the cables being used and the steps needed to fix it. Did you ever suffer from an iPhone 5 that wouldn’t turn on, or charge over 1%?
[via iphonehacks, iMore; mendmyi]