Lumia 925 first frozen and then switched off. Now unable to switch on - Microsoft Community

morning phone lumia 925 frozen. tried soft reset pressing power button , volume down. phone did not start. plugged wall charger battery charged. phone not turning on. 

hi,

we suggest perform hard reset.  if phone unresponsive , can't reach settings , may able reset phone using hardware buttons:

1. press , hold volume down and power buttons @ same time until feel vibration (about 10–15 seconds).

2. when feel vibration, release buttons, , press , hold volume down button until see large exclamation mark.

3. once exclamation mark appears, press following 4 buttons in order: volume up , volume down , power , volume down . phone should reset , restart itself. (it might take while reset finish.)

if hard reset didn't work, suggest use windows device recovery tool. start downloading , installing windows device recovery tool (for windows 10, 8.x , 7).

when installation has finished, start application , main screen appear:

the procedure restore phone using windows device recovery tool follows:

1. connect the phone pc (using usb cable came phone).
2. after few seconds, pc should find phone , you'll see phone selection screen. click phone in screen select it.
3. after few seconds more, latest available firmware version device shown. click 'install software'/'reinstall software' button flash phone

windows device recovery tool download , install latest firmware + os available phone

note! phone reset factory status when using tool.

let know results.

regards.

Mobile Devices / Microsoft Lumia and Nokia Lumia / Tips, tricks, and customization