If your iphone 4 won’t turn on, you have a few options for fixing the issue. However, first you need to determine if the problem is hardware or software related.

If it’s a hardware issue, you can bring your phone to a repair center and have it checked. If it’s a software issue, then it may be easier to reset the device.

Reboot

When your iPhone isn’t working as you expect it to, a reboot can help flush away some of the bugs that may be causing the issue. In most cases, a simple restart will solve the problem without losing any of your data or settings on the device.

A hard reset isn’t something that you should try every time your iPhone is acting up. But it’s a great first step in troubleshooting many of the issues you might be experiencing on your device, like sluggish performance, connectivity problems, and more.

For instance, an app might crash or start to act in a strange way, or your iPad might have a little meltdown when you launch Stage Manager in iOS 16. Whatever the issue, rebooting your device will generally fix it, and it’s one of the best ways to get your device back into shape.

The most common way to reboot an iPhone is to use its physical buttons. The buttons on your phone are typically labeled “Side,” “Top,” and “Power.” Press the Side button until you see the power off slider appear, and then drag it to the right.

Once you’ve done that, turn off the device and wait for a few seconds before pressing it again to restart it. Doing this will require you to enter your device’s passcode and unlock pattern, so make sure you know those before you proceed.

Replace the Battery

If you have an iPhone 4 that isn’t turning on, it may be time to replace the battery. Apple’s batteries are designed to retain a minimum of 80% of their original capacity after 500 charges. This is a great feature, but it does mean that your battery will begin to degrade after about one and a half years of usage.

If the battery is old and deteriorating, it is time to change it. You can buy batteries from online stores that sell replacement parts, or you can go to a repair store that is certified to work on Apple products.

First, make sure that your iPhone is turned off and unplugged from the charger. You can use a paperclip or small suction cup to remove the rear cover. You will need to be careful when pulling the back cover because some screws can be hidden without being noticed.

Next, locate the silver battery connector panel toward the bottom left of the iPhone. This is attached to the logic board with two screws. Take your time to unscrew these screws, as attempting to force the connector out could break it.

Once the two screws are out, use a plastic opening tool to gently pry up the connector. Be careful not to damage the adhesive that securing it to the logic board, as this will weaken the connection and increase your risk of shorting out electrical components.

Using the edge of the plastic opening tool, run it along the right side of the battery and pry up at several spots to completely separate the battery from the adhesive that is securing it to the outer case. Once the battery is free from the adhesive, use a clear plastic pull tab to remove it. Be very careful not to pull too hard, as this will tear the clear plastic tab off easily.

Plug It Into a High-Power USB Port

If you have a high-power USB port, like the one found on Macs, it can be a great way to speed up your charging times. However, if you have an older device or device with a lower-capacity battery, it might not work as well.

The iPad, iPhone, and iPod touch will charge up when plugged into a USB port that’s capable of pulling 500 milliamps of current (which is the maximum allowed in the USB 2.0 specification). But Apple has engineered these devices to prefer to pull more than that.

Fortunately, a USB port can be changed to a high-power port so that the iPad can be charged faster than it would otherwise. You can change it in Settings > General> USB Charging.

If you don’t have a high-power USB port, you can try connecting your phone to a TV using an MHL cable that plugs into the HDMI output on the device. Then, you can play videos and pictures from the smartphone to the television.

You’ll need an MHL adapter that’s compatible with your phone and TV, so look for a list of the types on Google or the manufacturer’s website. You can use the adapter to connect your phone to a computer or other device for screen mirroring, too.

The only problem with this method is that you’ll have to plug the adapter into a separate power source. Luckily, most modern phones and tablets support wireless charging.

But you’ll still need a charging cable that’s compatible with the adapter. You can buy a third-party accessory that does the job, but you’ll want to make sure it’s Apple-certified.

Finally, a USB hub can also make your charging experience easier. Many hubs support multiple ports, so you’ll have a lot of options for how to connect your devices.

Perform a Hard Reset

When your iPhone 4 or iPhone 4s gets stuck in a software glitch, you might want to try doing a hard reset. It won’t erase any data, but it will reset the device and refresh the software on it. This is a great solution for those who have software issues that they are unable to fix using other methods.

There are a few different ways to do a hard reset on your iPhone 4. One way is by connecting it to a computer and resetting it through iTunes. However, this method can be a little challenging for some people.

Another way is to use a third-party app. For example, Tenorshare Reiboot can help you factory reset your iPhone without iTunes.

While the app doesn’t offer a number of options to select for resetting your iPhone, it can do a pretty good job. After you install the app, you can back up all of your data using it before resetting your phone. Then, once you’ve performed a factory reset on your iPhone 4, you can set it up afresh like it was the first time you purchased it.

You’ll also need to enter your Apple ID and password if you haven’t already. This will allow you to access the setup assistant, which you can then use to restore your device from a backup or reset it as if it were new.

Finally, you can reset your iPhone 4 by pressing the Home button and Sleep/Wake/Power buttons together. After holding both of these buttons down for a while, the screen will turn black and the Apple logo will appear on the screen. Once you see this, release both of the buttons and your iPhone will be reset to its original factory state.