N82 Completely Crash, Please HELP!!

Question

Hi everyone,
My N82 is completely crash and I do not know how to fix.
I never dropped this phone and never used messily. Because I love this phone since I got it.
I tried all possibility to fix.
To take out SIM and SD. To reinstall the firmware.
I guess it started after I installed new firmware v20.
Here are my problem
1. while calling, the phone suddenly freeze and cut a communication. It also happens many times when I hang up the phone call. After a moment it turns off.
2. When I turn on the phone, it just show black screen and keep turn on a backlight.
3.When I remove the SD, sometimes it turns on correctly but few hours later, it shows black screen and backlight.
4.When I charge the phone, it also shows black screen and backlight.
I hope this is software problem because I am using it in Japan and Japanese customer center doesn't support this model.
SOMEONE PLEASE HELP!

Answer 1

Try a hard reset, but backup everything you want to keep. Also remove the memory card before you do it and try it without the card to see if it works. If it does work you may need to format the memory card to avoid any slowdown.
Hard reset:
1. Switch off the phone.
2. Hold down the following three buttons: Green (the call answer button), * button, and '3' button.
3. While holding these buttons, press the power button and switch on the phone.
4. Release when the phone shows the nokia logo or shows other signs of life like the language selection screen.