Q: Iphone 5s

Try to reset your device. This won't delete your data stored on this device.

• Press and hold the Sleep/Wake button
• Press and hold on the Home button
• Keep holding both buttons until the display turns off and back on with Apple logo on it.

Alternatively, you may go to Settings - General - Reset - Reset All Settings

If this does not help, restore your device to factory settings. Note that this will erase the data from your device.

Take a look this Apple Support article: Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support.

If it does not help:

https://www.apple.com/support/iphone/repair/screen-damage/

Did you already try the troubleshooting mentioned in this article?

If the screen on your iPhone, iPad, or iPod touch doesn't respond to touch - Apple Support

If the screen has to be replaced, this is what you might have to pay:

Screen repair service pricing

Repair and replacement costs depend on your iPhone model and your AppleCare product coverage. Apple will run a diagnostic test to determine whether your iPhone has experienced additional damage. If it has, or if it needs other repairs, you may need to pay an out-of-warranty service fee. Accidental damage isn't covered under the Apple One Year Limited Warranty.

Model	Screen repair cost
iPhone 6	$109
iPhone 6s, iPhone 6 Plus, iPhone 5s, iPhone 5c, iPhone 5	$129
iPhone 6s Plus	$149

Plus a $6.95 shipping fee, if required. Fees are in USD and exclude local tax. Pricing is for service through Apple. The final service fee we charge will be determined during testing. Pricing and terms vary for service through an Apple Authorized Service Provider.

copied from: Service Answer Center - iPhone