Blackberry 8800 turns off by itself.

Did you upload some different type of software.
Format your device

Screen option>security option>general settings>(press the menu button) wipe handheld>type “blackberry”

Best Regards & Thanks
Akhtar Mohammad Kalim

Step 1 Ensure the Blackberry Desktop Manager is installed using Blackberry Internet Service, and not Blackberry Enterprise Server. If you are unsure, it would probably be a good idea to uninstall the Desktop Manager and start again.

If you don't have the CD that came with your Blackberry, the Software can be downloaded here.

Step 2 Download the file policy.bin and save it in your Blackberry installation directory (C:\Program Files\Research In Motion\BlackBerry).
Step 3 Wipe your Blackberry, creating a backup if necessary. Select Options/Security/Wipe on the Device.

If this option is unavailable, you may have to install the latest software on your Blackberry. You need to Download and install the latest Desktop Manger Software, then the latest Handheld Software. Connect your device, open the Desktop Manager, select Application Loader, and follow the prompts.

Step 4 Close the Desktop Manager if it is open.
Step 5 From the Windows Start Menu select Run..., and at the prompt type regedit. In the tree on the left hand side, navigate to:

HKEY_Current_Users\Software\Research In Motion\BlackBerry\PolicyManager

Right-Click the Policy Manager Folder and select New/String Value. Name the value Path. Now, Double-Click the Path Subkey and set Value Data to:

C:\Program Files\Research In Motion\BlackBerry\policy.bin
Step 6 Open the Desktop Manager.
Step 7 Connect the Device.

Verification
Once complete, the Options/Security screen on your Blackberry should not contain references to an IT Policy, you should now be able to change all settings (including password prompts), and install Third Party Applications.

If you want to install Blackberry Messenger on handheld do the following steps :

1. Download the latest BlackBerry Device Software from your service provider's web site.
2. Install the BlackBerry Device Software onto a computer that has BlackBerry Desktop Manager installed on it.
3. Connect your BlackBerry device to the computer.
4. From BlackBerry Desktop Manager, double-click Application Loader and follow the instructions in the Application Loader Wizard to install the BlackBerry Messenger application.

Once you get a blackberry email account set up through your phone you'll have to turn your phone off then on and then your phone will automatically download and update itself, and you'll have your applications :)

Browser disappeared after your first syncing with the Desktop Manager
1. Run Desktop Manager, make a backup of your phone.
2. Go to the Phone and Device Support site, find the Blackberry Software Downloads link.
3.Download the new 8800 OS to your PC Desktop.
3. Run the install file from your desktop, follow the prompts.
4. Connect your 8800 to the PC, run Desktop Manager. You will be prompted to upgrade, click Yes.
5. Allow the phone to upgrade. This will take a long time 15-20 minutes is not unusual.
6 If it is working properly. You will get a white screen with spinning hourglass while this is going on.
6.Allow the phone to finish updating, it will reboot itself at the end of the process.
7. Hope this helps and welcome your Browsers back.

Note :: This is tested for perl but perl and 8800 has same features so lets hope for the best . And please let me know .

Reload using BlackBerry Desktop Manager or downloading the application from the BlackBerry.
Complete the following steps:
1) Download the latest BlackBerry Device Software from your wireless
service provider's web site.
2) Install the BlackBerry Device Software on a computer that has
BlackBerry Desktop Manager installed on it.
3) Connect your BlackBerry smartphone to the computer.
4) From BlackBerry Desktop Manager, double-click Application
Loader and follow the instructions in the Application Loader Wizard
to install the BlackBerry Messenger application.

As jamers2004's question. You need to install the DTM software that came with the device or it can be downloaded from the BlackBerry web site.

Plug in the USB lead, find your device and choose the sync option.

David

If the battery is fully charged, it should turn on by pressing the button with the red phone reciever on it. Its to the right of the trackball next to the bent arrow button.

you should delete that and us just the msger or bbm on the phone maybe that particular software is not compatible with the BB OS.

you will have to install blackberry desktop manager in order to route enough sufficient power to your blackberry device. you can download that software from the CD rom that came with your phone or by going to the following link:

http://na.blackberry.com/eng/services/desktop/

as soon as you download that software go to options, connection settings and change the connection type from NONE to USB PIN: ^^^^^^^ and it will charge just fine! :)