How do I know if my touch screen is damaged

By Isabella Storyclaire

last updated September 17, 2024

Contributions sourced from

How-To Geek

So, you've scratched or cracked your new smartphone or tablet screen. In search of a quick-fix, you stumble across endless listicles that advise you to use automotive wax, toothpaste, or even a glass buffer. Do any of these methods actually work?

Most of the time, the answer is no. In fact, some of them could make your problem worse. We've got some real tips that can repair your scratched smartphone or tablet screen.

Don't Sand Down Your Scratched Display

Sandpaper is an abrasive material designed to gradually remove a thin layer of whatever you use it on. You can get it in a range of grits from very coarse to very fine. Most commonly, people use it on wood to remove splinters and create a smooth surface.

If you're building a picnic table, you might want a roll of sandpaper. If you're trying to remove scratches from your smartphone, sandpaper is one of the last things you should use. Even if you use a very fine grit on the surrounding area, it's still a bad idea.

When you sand the surface of a touch screen, you just create more scratches. You'll wear away any remaining oleophobic (oil-repelling) coating, and the screen will almost certainly look worse than before you first started. If you don't want to trade the scratches for a blurry mess, leave the sandpaper alone.

Avoid Glass Buffing with Cerium Oxide

To glass buff something, you use a drill and a buffing wheel to gradually wear down a layer of the glass, which removes any scratches in the process.Professionals do this to remove scratches from car windshields and shop windows; it's a precise and exacting process. It also requires a steady application of cerium oxide and water, plus careful thermal management.

John Herrman attempted thisprocess for Popular Mechanics, but it didn't go well for him:

"Glass grinding requires the steady application of wet-mixed cerium oxide, which is quite messy, and sprayed water, a natural enemy of all things electronic. I attempted to seal the phone with tape, but the sticky cerium slop found its way into almost every opening, drying like a fine cement."

Despite the messy process, John pushed on with disappointing results:

"My inconsistent water application had resulted in overheating, which destroyed an area of the underlying LCD. For a touch screen device, glass grinding is, in other words, overkill."

Even with careful thermal management, precise application of water and cerium oxide, and masterful use of a buffing wheel, you're still removing a layer of your touch screen, which is ill-advised.

Skip Turtle Wax and Other Auto Scratch Products

Turtle Wax and other auto cutting agents are designed to remove scratches from metal and paint by removing a fine layer of the scratched material. As the cutting agent works its magic, scratches appear less deep and, in some cases, disappear altogether with a good buffing.

Your smartphone's screen is not made of metal or covered in paint, though. The glass in your smartphone was never meant to be "cut" in this manner. At the very least, auto wax will completely strip the oleophobic coating from your display. This means more smudges and grease on your display.

Real-world testing of auto wax reveals even more disappointing news, as John Herrman of Popular Mechanics alsopointed out:

"One standout claim is that a coat of Turtle Wax will minimize scratches; in my testing, it did nothing of the sort, and left behind a thin film of wax, which attracted fingerprints. Others point to 3M scratch remover for cars as a possibility; three rigorous applications did nothing for the iPhone. Displex, a polish for plastic screens and another favorite among online DIYers, left the screen immaculately shiny and seemed to darken the appearance of scratches, but this was a temporary effect of lingering residue."

Don't Use Toothpaste or Baking Soda to Polish Out Scratches

Toothpaste and baking soda work the same way as other abrasive compounds. They cut away a fine layer of the scratched surface, so the scratches appear less deep or disappear altogether.

Depending on the brand and ingredients, toothpaste can range from gentle to abrasive. Even if you apply toothpaste to your screen and polish it vigorously, you're still stripping a layer of your touch screen. Goodbye oleophobic coating, hello smudges.

You might find that toothpaste is completely ineffective and turn to baking soda, which is also a common ingredient in many whitening toothpastes. This is similar to cutting your screen with auto wax or other cleaning products, and it will only make things worse.

While you might start the process with a few nasty scratches, you could end up with a blotchy screen that's unpleasant and impractical to use.

You Can't Fill a Scratch with Oil

The rumor that you can "fill in" scratches with oil is bizarre, but somehow, it persists online. While oil has a tendency to find its way into nooks and crannies, there's no reason for it to stay there once applied.

If you apply vegetable or mineral oil to your screen, you'll just make a mess. Once you put the device back in your pocket or pick it up, the oil will disperse. The scratch will still be there, and you'll just have oil all over your hands and in your pocket.

What to Do Instead

Now that you've successfully avoided some of the worst advice on how to remove scratches from your phone screen, what can you do?

Apply a Screen Protector

It might seem like "too little, too late," but a screen protector can reduce the appearance of scratches. If you apply a soft plastic screen protector, it can "fill in" scratches and provide a small layer of protection.

A tempered glass screen protector is even better! It applies a fresh layer of glass to the touch screen. You might still be able to see the old scratches underneath, but you won't be able to feel them. Plus, the glass will provide superior protection against any new scratches.

Before you apply a screen protector, clean the screen thoroughly with a soft, damp, cotton cloth. Avoid abrasive cleaners, cutting agents, or household products, like Windex.

Get the Screen Replaced

If you can't live with the scratch, you can always have the screen replaced. Most people wait until the screen cracks before they take this step because the cost is relatively high.

The cheapest option is to replace the screen yourself. With an iFixit guide, the appropriate set of tools and replacement parts, and some technical know-how, you can often replace a screen yourself at a fairly low cost. However, you should avoid trying this unless you're confident you can disassemble your device, replace the screen assembly, and then put everything back together again.

Another option is to take your device to a third-party repair center. However, the replacement parts will likely be from a third party, as well. They might perform poorly, even when compared to a damaged device with a first-party display. Scratches are merely cosmetic; they don't affect a device's functionality.

Related: How to Repair Your Own iPhone

You can also go with a first-party repair. If you have an iPhone, Apple will replace the screen for you at a premium. However, the parts will be high quality, and they'll be replaced by a trained technician. You also won't have to deal withthe problems you might encounter if you get third-party repairs on an iPhone or iPad.

If you have AppleCare+, this service costs $29. And keep in mind, AppleCare+ only covers two incidents of accidental damage. Contact your smartphone manufacturer to find out the full range of options available to you.

Ignore It

The cheapest option is to ignore the scratch. After all, the screen isn't broken, and a few blemishes won't affect your phone's functionality.You'll probably replace it in a year or so, anyway.

When you do upgrade your phone, be sure to apply a high-quality glass screen protector. It's a lot easier to replace a protector than it is to remove scratches from or replace a damaged screen.

Deciding on a LCD or Digitizer Screen Replacement

When you drop your device, you may immediately pick it up and try to turn it on to see what happened. Sometimes, the screen will be completely cracked, but theres still a display. Other times, the screen is cracked and there is no display. A few different things happen when an iPad or iPhone drops. Understanding what happens to the screen can help you know what type of repair you need.

When you drop your iPad or iPhone and the screen doesnt come on (there is no display) or the display is distorted, its likely the LCD screen is broken. This screen has everything to do with seeing what you love about your device. Videos, games, email, and everything else depends on your LCD screen.When you cant see the display or it doesnt look right, you need to have the LCD screen replaced.

Digitizer Screen Repair

Sometimes, you may be able to see the screen, but when you touch it to do something, it wont react to your touch. This is usually because the digitizer is damaged. Many times, this happens even when you cant see a crack on your device. This is why many people dont think they need a screen replacement, and actually, in some cases they still dont need it. Other components may be damaged that cause the touch not to work, but when those are all working okay, its the screen.

There are some cases in which both the LCD and digitizer need to be replaced. If theres no display or a distorted one AND theres no touch response, the LCD and digitizer need to be replaced. This is usually what people need when they turn to us with a shattered iPad or iPhone.

What if You Still Dont Know

If you still dont know if you should have a LCD or digitizer repair, contact our certified technicians. They can look at your device for free to provide you a repair quote. You can trust our technicians to give you the truth, so you can save money when you may not need both screens replaced. If you do, you can be sure that youll receive a quality repair with quality parts.Contact us now for more information about getting your iPhone or iPad repaired quickly and for an affordable price.

Fix a screen that isn't working right on Android

Try the solutions below if your phone screen:

Doesnt respond
Flickers
Jumps
Flashes
Shows dead pixels
Stays blank

Step 1:Check your phone's screen

Important:After you try each recommended solution, check to find whetherit fixed your issue.

Make sure that your screen isn't cracked, chipped, or damaged.
If you have a case or screen protector, take it off.
If you're wearing gloves, take them off.
If you've put any stickers over the screen or sensors, peel them off.
Make sure that your screen is clean.

Step 2: Try these troubleshooting steps

Find out whether an app causes your problem

Important: To learn how to turn safe mode on and off, go to your device manufacturers support site.

Turn on safe mode.
Touch the screen.
- If the screen works in safe mode, an app is most likely causing your issue.
Turn off safe mode.
To find the app that causes issues, uninstall recently downloaded apps one by one. After you remove the app that causes the problem, you can reinstall the other apps you removed.

Test the affected part of your screen

Touchthe top left corner of the screen.
Slowly drag your finger to the bottom right corner without lifting. Try to move your finger slowly enough that you can count to 10 before reaching the opposite corner of the screen.
- If you can drag your Quick Settings bar and notifications all the way to the bottom of the screen The problem isn't caused by a specific area on your screen. Learn how to reset your phoneto factory settings(below).
- If your Quick Settings bar and notifications releasewhile you're still dragging your finger across the screen Repeat the test. If they releaseagain, note whether it happened in the same place on the screen. Thencontact your device manufacturer.

Turn off developer options

Open your phone's Settings app.
Tap SystemDeveloper options. You'll see this only if you have developer options turned on.
Turn off Developer options.

Step 3: Use advanced troubleshooting

Consider resetting your phone to factory settingsImportant: Afactory data reset will remove all data from your phone.

You can restore any data stored in your Google Account, but all apps and their associated data are uninstalled. Before you perform a factory data reset, back up your phone.

Tips:

If your phone doesn't respond or stays blank, you can use the your phone's buttonsto trigger a factory data reset.
If an app that you downloaded caused the issue and you reinstall that app, the problem could come back.