Lumia 640 LTE Dual Sim in Boot Loop, Vibrates but Black Screen

[Windows Central Question]

Hello, so yesterday I had my Lumia on my hands and I just took the case off it and the battery dropped. It happened in the past with no problem. So I put the battery back on and I tried to boot the phone. Since then the phone vibrates, nothing appears on the screen (just black) and after some seconds it vibrates again... and again.

I tried:

- Removing and putting back on the battery
- Hard resetting the phone (It seems that it doesn't even get the signal to hard reset. Just restarting all the time)
- Using the WDRT to flash it but the process fails because before its complete the phone restarts (plus it is not recognized)

I need advice please :/

 

[shmsnh]

Is it under warranty? If yes, take it to a service centre.

Otherwise, you could try selecting 'my device was not detected' on WDRT.

 

[Chintan Gohel]

Hello, so yesterday I had my Lumia on my hands and I just took the case off it and the battery dropped. It happened in the past with no problem. So I put the battery back on and I tried to boot the phone. Since then the phone vibrates, nothing appears on the screen (just black) and after some seconds it vibrates again... and again.

I tried:

- Removing and putting back on the battery
- Hard resetting the phone (It seems that it doesn't even get the signal to hard reset. Just restarting all the time)
- Using the WDRT to flash it but the process fails because before its complete the phone restarts (plus it is not recognized)

I need advice please :/

are the battery contact pins clean? Or damaged? Or the pins on the phone?

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