Just a couple of things to check, may or may not work: - Does it have gas? - There is typically a switch on the lawn mowers that cuts off gas supply to the engine. Has it been turned to 'Off' position by someone?
Since it actually shows the logo, it has the energy to start. It sounds like you have a software problem. What you are describing is called a boot loop. Was the OS was corrupted? Maybe virus or bad attempt at custom Rom? Ask your friend about what she/he did software wise.
Hi Wisam, It's likely the proximity sensor. Those things are a bit tricky to put back in correctly (at least in my experience). Do the following tests. Simple: - take the phone next to a very strong light (for just a couple of seconds, you don't want to melt it) and press the power button. Does the phone wake up? Medium Complexity (be very careful not to fry the motherboard or screen by static - do at your own risk) - turn off the phone - take off the back cover and the top motherboard cover. - carefully remove the proximity sensor from its nest, so that the sensors are facing the light - very carefully turn on the phone back on - once the phone is on, put it to sleep and try to wake it up again either with tapping screen or power button. - turn off the phone (completely power it down) - reassemble If either of these work, your proximity sensor just needs to be wiggled a little in its nest so that it is picking up light. Make sure it has it's rubber 'glove' still on. If you are still having problems, take...
Do you have a Custom Recovery or Factory? If former follow the directions to get into the recovery mode. From there restore the prior ROM. If latter do Hard Reset.
Hi Nikola, Has your update fixed the problem? If not, it is likely the proximity sensor. Have you opened the phone up before it started, replaced screen? Do the following tests. Simple: - take the phone next to a very strong light (for just a couple of seconds, you don't want to melt it) and press the power button. Does the phone wake up? Medium Complexity (be very careful not to fry the motherboard or screen by static - do at your own risk) - turn off the phone - take off the back cover and the top motherboard cover. - carefully remove the proximity sensor from its nest, so that the sensors are facing the light - very carefully turn on the phone back on - once the phone is on, put it to sleep and try to wake it up again either with tapping screen or power button. - turn off the phone (completely power it down) - reassemble If either of these work, your proximity sensor just needs to be wiggled a little in its nest so that it is picking up light. Make sure it has it's rubber 'glove' still on.
Has it only deleted data for some of the apps but not others? Has it started after you installed a new app? Do you have any anti-virus apps on it? If not install some and run them.