Push and hold the red end call/power button for at least 5 seconds.
Ensure the phone battery is charged. Plug the phone into a functioning charging station for at least 2 hours.
A damaged screen may make the phone appear like it is not turning on. If the phone is making sounds, but the screen is not displaying anything, try replacing the screen. See Siemens A56 LCD Display Replacement.
A malfunctioning keypad could prevent the phone from turning on. If the power button is unresponsive, replace the keypad. See Siemens A56 Keyboard Replacement.
If the none of the above steps solved the problem, replace the motherboard. See Disassembling Siemens A56 Motherboard from Keypad Interface.
When the phone changes ownership, or as the network experiences upgrades, the SIM card may need to be replaced. See Siemens A56 SIM Card Replacement.
Ensure the device is charging by plugging it into a charging station that is known to work correctly. It is also important to ensure that the outlet is functioning correctly.
Batteries have a limited amount of time in which they can hold a charge. Sometimes an old battery needs to be replaced with a newer battery. See Siemens A56 Battery Replacement.
Check for damage in the charging port and clean or replace if needed. See Siemens A56 Clean Charging Port Replacement.
If the front cover is cracked or the color is not preferred, it can be replaced. See Siemens A56 Front Plate Replacement.
If the buttons are loose or broken, the keypad will need to be replaced. See Siemens A56 Keyboard Replacement.
If the screen does not power on, ensure that the connections are secure or replace the screen. See Siemens A56 LCD Display Replacement.
If none of the steps listed above solved the problem, replacing the motherboard is the only remaining option. See Disassembling Siemens A56 Motherboard from Keypad Interface.
