My blackberry wont turn on

You have not indicated if the blackberry will run when absent a battery it is plugged into a charger. If it does, that suggests a battery problem and you simply need to replace the battery. If a red light blinks on the blackberry when you try the above, try a hard reset. But before that, try the below.

Push and hold the call button and alternate with the end call button until the hourglass shows. Allow some time to boot up.

Here is the hard reset procedure:

http://www.hard-reset.com/blackberry-9100-hard-reset.html

You may contact Blackberry support if this does not work.

You can reset blackberry phones from network restriction using unlock codes, you can purchase such codes from any vendors online like
http://www.unbblock.com/blackberry/rs18wp8/

Well you can again upgrade the 9700 software from here
http://senseapplied.com/index.php/upgrading-blackberry-9700-and-9300-to-firmware-6-0-0-448/
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Farhan

You will need to plug your handset in to desktop manger, and reset it i would also update the software.

With any JVM Error you are going to need to reload the operating system to your device, this process is slightly different with each carrier, so it is important to contact them during the process, first (if you have not done so already) Download and install the Blackberry Desktop Manager to your computer, The Desktop manager can be obtained from blackberry.com once installed you will need to download and install the most up to date software from your carriers website,then follow the instructions to install the software to your phone, now unfortunatly your going to lose any information you have not backed up to your computer

Hope This Helps!
William

Set the date and time To set the date and time displayed on the BlackBerry smartphone, complete the following steps:

1. In the Clock application, press the Menu key.
2. Click Options.
3. Click Set Time.
4. Set the date and time.
5. Press the Menu key.
6. Click Save.

Retrieve the date and time from the wireless network To retrieve the current date and time from the wireless network, complete the following steps:

1. In the Clock application, press the Menu key.
2. Click Options.
3. Click Set Time.
4. Set the time zone in the Time Zone field.
5. Perform one of the following actions:
   • To retrieve the date and time from the wireless network that your BlackBerry smartphone is connected to, change the Date/Time Source field to Network.
   • To retrieve the date and time from the BlackBerry® Infrastructure, change the Date/Time Source field to BlackBerry.
6. Press the Menu key.
7. Click Update Time.
8. Press the Menu key.
9. Click Save.

Note: To set the time manually, change the Date/Time Source field to Off.

When adding, deleting, or updating applications on your BlackBerry smartphone, you receive the following error message:
Device error 400
OR
your BlackBerry device resets itself and stops responding.

CAUSE
An unspecified error has occurred with an application on your Blackberry smartphone.

RESOLUTION
NOTE:The following procedures will delete either all data, or all data and applications on the BlackBerry smartphone. Back up the data on your BlackBerry smartphone before performing this procedure.

1. Disconnect your Blackberry smartphone from your computer.
2. Open BlackBerry Desktop Manager.
3. Open BlackBerry Application Loader.
4. Reset your Blackberry smartphone.
5. When the LED indicator has turned on, reconnect the BlackBerry smartphone to the computer.
6. Click Next.
7. On the following screen you will see either USB:Unknown or USB:; click Next.
8. Select the required applications from the applications list and click Next. The firmware is loaded to your BlackBerry smartphone.
   

Try doing a hard reset on the phone. Did you drop the phone? Try http://www.pdasmart.com for your blackberry repair needs!

you needto reinstall the blackberry software on your phone using the blackberry desktop. Download your corresponding software (t-mo=8120, AT&T=8100) and install it on your computer. then using the Blackberry desktop, under install apps, reinstall your software into your phone

I think the reset button is under the battery cover - You may need a paperclip to reset.

Before you do the hard reset have you tried a soft reset - ALT+RIGHT SHIFT(CAP)+DELETE keys