Ursprünglicher Beitrag von: Brendan ,
Few things to try: * Verify that your phone has a sufficient charge. * Connect your original charger to your phone. * After a few minutes, try to turn on your phone. If it doesn't work, try another charging cable. Try mains and USB charging. * Verify that your phone, charging port, and battery contacts are not damaged. * Carefully inspect your phone's charging port and remove any debris. * Remove the battery. * Carefully clean and inspect the gold contacts on both the battery and on your phone. Attempt a forced restart of the phone. * Press and hold the Power key for 30 seconds. * If the phone starts to power on, release the Power key.