If your iPhone 17 Pro Max has a black screen and won't turn on, the first thing to try is a force restart. Press and quickly release the Volume Up button, then quickly press and release the Volume Down button. Immediately after, press and hold the Side button. Keep holding it until you see the Apple logo appear, which can take up to 15 seconds.
This is the single most effective step for clearing a temporary software glitch that's causing the black screen. It's the equivalent of pulling the plug and plugging it back in for your phone's brain, without deleting any of your data.
Check Your Charger and Cable
Your phone might simply be out of battery. Connect it to a power source using a USB-C cable and a compatible wall adapter. Because of the iPhone 17 Pro Max's large battery, I'd recommend leaving it to charge for at least an hour before trying to turn it on again.
For the fastest possible charge, use Apple's 40W Dynamic Power Adapter, which can deliver up to 60W to this model. If you're using a slower charger, like an older 5W or 12W brick, it will take significantly longer to get enough juice to wake the phone from a completely dead state.
Also, try a different USB-C cable if you have one. Cables can fail internally, and a phone with a totally drained battery won't give you the usual charging indicator. MagSafe or Qi2 wireless charging is an option too, offering up to 30W, but a wired connection is more reliable for troubleshooting a no-power situation.
Inspect for Physical or Liquid Damage
Take a close look at your iPhone. Has it been dropped recently, or could it have been exposed to water? Even with its improved water resistance, liquid damage can cause a sudden black screen and failure to power on.
Check the USB-C port for any lint, debris, or corrosion. Use a dry, soft-bristled brush (like a clean, unused toothbrush) to gently clean out the port. A blocked port can prevent the charging connection from being made, tricking you into thinking the phone is dead.
Try a Different Power Source
Plug your charger into a different wall outlet. The outlet itself could be faulty. Avoid charging from a computer's USB port or a low-power accessory port in a car or airplane for this initial recovery charge, as they often don't provide enough power.
If you're using a power strip or surge protector, try plugging the charger directly into the wall instead. It's also worth noting that the iPhone 17 Pro Max can get warm during fast charging sessions, which is normal, but if it becomes excessively hot to the touch, unplug it and let it cool down.
Connect to a Computer
Grab a known-good USB-C cable and connect your iPhone 17 Pro Max to a Mac or a Windows PC with iTunes installed. Listen for the connection sound on the computer or look for the phone to appear in iTunes or Finder.
Sometimes, a phone with a deeply drained battery or a minor software hang will show up on a computer before it shows any life on its own screen. If it's recognized, you may be able to update or restore it through the computer.
Check for a Display Issue
In a very dark room, shine a bright flashlight directly at the black screen. Look very carefully for any extremely faint images or backlight glow. If you can see a very dim display, your phone is actually on, but the screen backlight has failed.
You can also try calling your phone from another device. If it rings or goes straight to voicemail, that's a clue about its state. If it rings, the phone has power; if it goes to voicemail instantly, it's likely off or completely dead.
Enter Recovery Mode
If the force restart did nothing and the phone remains unresponsive, you can try putting it into Recovery Mode. This allows you to reinstall iOS 26 via a computer, which can fix underlying software corruption.
First, connect your iPhone to your computer with a cable and open iTunes or Finder. Then, quickly press and release the Volume Up button, quickly press and release the Volume Down button, and then immediately press and hold the Side button. Don't let go when you see the Apple logo; keep holding until you see the Recovery Mode screen (a cable pointing to a computer icon).
Your computer will then prompt you to either Update or Restore. Choose Update first, as it will reinstall iOS without erasing your data. This process requires a stable internet connection.
Perform a DFU Restore
A Device Firmware Update (DFU) mode is the deepest type of restore for an iPhone. It reloads the firmware and the OS, and it's often the last software fix for a black screen of death. Be warned, this will erase all data on the phone.
Connect to your computer and open iTunes/Finder. Quickly press and release Volume Up, then Volume Down. Now, press and hold the Side button for 10 seconds. After 10 seconds, without letting go of the Side button, also press and hold the Volume Down button. Continue holding both for 5 seconds, then release only the Side button while still holding Volume Down for another 10 seconds.
If the screen stays completely black but your computer detects a device in recovery mode, you've successfully entered DFU. Your computer will guide you through the restore process. You'll need to set up the phone as new or from a backup afterward.
