Blackberry 9720 will not turn on

Are your referring to reset username and password for blackberry account. If yes, please refer steps below to reset the password

1. Visit http://global.blackberry.com/en/bbid.html and complete the instructions on the screen.
2. You are prompted to sign in with your BlackBerry ID, click Forgot Password. Answer your security question and complete the instructions on the screen.

Once you have completed the steps above, you will receive a password reset email. If you complete the steps to reset your password on a computer, the password reset email can only be viewed on a computer and isn't delivered to your device. If you follow the steps to reset your password on your device, the password reset email will be delivered to your device. Complete the instructions in the email to reset your BlackBerry ID password.

Note: You cannot reset the User ID, if in case you need to change your user id you need to create new BBM account.

GuruAid.com

Signal is not required to unlock a Blackberry 9720. All you need is a non accepted SIM card. Once you enter a non accepted SIM card in your Blackberry 9720, it would prompt you to enter an unlock code. You can get the accurate unlock code for a Blackberry 9720 from SuperUnlockCodes.com at affordable cost. Good luck.

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..............UNLOCKING INSTRUCTIONS..............
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1 - Switch ON your Blackberry 9720 with your current network/service provider's SIM card.
2 - Using the menu go to Settings Menu -> SIM card and press select.
3 - While holding the SHIFT key, type mepd.(NOTE: You may not see any text appear on the screen while typing mepd)
4 - You should now see the five locking categories listed.
5 - While holding the SHIFT KEY, type mep2.(NOTE: You may not see any text appear on the screen while typing mep2).
6 - Release the shift key.
7 - You will now be prompted to enter the Network MEP code. (it will also state how many attempts left)
8 - Enter the Unlock Code.
9 - Enter Return/Enter.
10 - The Blackberry 9720 should then be unlocked.

Hi Michelle. I have the same phone and it happened to me a few times. On most phones the battery swells up when it reaches it's charging life end. In the 9720 the battery can still LOOK okay even though it might have reached its life-span. I eventually purchased a new battery, and wholaa, problem solved. A piece of additional advice is: Do not chat with you phone on the charger. Unplug the charger when battery is fully charged: We tend to charge the phone anytime and every time before we go to work or somewhere - you have to let the battery run flat on its own at least once a month, then start a fresh charge from fully flat to fully charged. This will prolong battery life. I a new battery does not solve the problem, have the charging pin checked out. Alternately if you know someone that has the same handset as you, ask them to stick your battery into their handset and visa versa. Hope this info help :)

try this:

JUMP STARTING A BLACKBERRY


1. Plug wall charger into wall and then plug into blackberry
2. Take off back cover and pull the battery out (while it is plugged in still)
3. Wait 30 seconds. The red LED may remain on (tech said it didn't matter).
4. Put the battery back in and wait about 5-10 seconds and it'll begin to boot up (white screen with clock icon).

Ok...don't panic. The charger you are using is not compatible. Verizon only works with verizon blackberry's. Non verizon will not work with blackberry and vice versa. This is what will happen. you plug it in and it will boot for a few seconds and then the lightning bolt you see is the charge icon and then a red line in it means that charger is not compatable. Blackberry does make its own charger but there is a "pin" on the plug in that will tell it it is not the right one. Am I confusing you?

my blackberry 8310 was low in battery had red bar then turned itself off i plug the charger in and it comes on red for a second, then the little egg timer comes on now and agan then turns itself off

• Press and hold down the ALT key on the smartphone.
  
• While holding down the ALT key, press and hold down the right-hand CAP key.
  
• With both of those buttons still pressed, press the DELETE key. The display on the Blackberry smartphone will turn off to indicate that the reset has started, and the keys can now be released.

Check whether this will fix the issue ,If not remove battery and sim when mobile is turned On and check.Still if you face same issue you need to re-install operating syatem to your blackberry

I have the same problem with my Blackberry 8120, died this morning, will not switch on, no red light, no charging light, completely dead... my computer does not recognise the blackberry at all so cant install any new software.. plus I need to recover all the information that is on the handheld... please help if you can....

Does your phone charge on the usb cable plugged into your computer?

The Ac adapter might have a short in it.