The Motorola Droid 4 won't power up. If the first solution doesn't fix your problem, continue on to the following solutions.
Hold down the power button, located on the top of the phone in the center, for three seconds. The screen should come to life after this is done.
Plug the charger into the Droid 4 and wait five minutes before attempting to turn the phone on with the power button.
When the Droid 4 is plugged into the charger, it doesn't gain any battery life.
Ensure that the USB is inserted into the Droid 4 and the plug. Then check that the USB is secured into the plug and the plug is secured into the wall properly.
Switch the USB cord with another USB cord, that you know is functioning, to make sure it is still working. Repeat this process with a different plug. If the phone won't charge, the connection into the phone may be the problem and it should be replaced.
When headphones are plugged in, you are unable to hear any sounds through them.
Your headphones may be broken. Try plugging them into a different device to make sure they are still working properly. If you can't hear anything through the new device, you need to replace your headphones.
Look into the headphone and check for any debris that may be interrupting the connection. You can see better into the headphone jack by shining a light inside of it. After removing the debris, plug in your headphones and listen for sounds.
The phone closes out of applications or shuts off randomly.
The phone can be restarted by turning it off and removing the battery. Refer to the battery removal guide for assistance. Once the battery has been taken out, put it back in and turn on the phone.
A factory data reset can be performed to restore the phone to the state it was when it was opened so all of the information stored on the phone will be gone. Locate the app menu from the home screen and then click settings. In the settings menu, press privacy and unselect the automatic restore. Next press factory data reset and then reset phone and finally erase everything. The factory data reset should take up to three minutes to be completed.
The sim card, keyboard, camera or other hardware related to the Droid 4 is not working properly.
If you can't send or receive calls or texts, you probably have problems with your sim card. Ensure that the sim card is properly placed into the housing slot. If the housing slot if dislodged of out of place refer to the sim card reader replacement guide.
If the rear cover removal tool is broken or lost, a paperclip may be used to remove the rear panel as shown in the rear panel replacement guide.