Camera everytime i try to use the camera option in my phone it goes to the camera mode (but just a black screen) for only a second then goes back to standby mode or the main menu. in short, my camera doesnt work anymore. anyone know how to solve?

Fault with main board. Damaged component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/

First I will suggest you to Return BIOS settings to their default levels. An overclocked or misconfigured BIOS can cause all sorts of random issues, including Black screen
After that restart your computer in safe mode by press and hold F8 keys until you get Advanced Options menu screen.Use the arrow key to highlight Safe Mode, and then press Enter, your computer will boot automatically to safe mode
Inn safe mode Update your graphic drivers from your system manufacturer site
If this is helpless then simply get Reginout that cleans your computer of temp files, history and cookies. Its also used to fix any registry errors.
Hopefully it will help you

Try resetting the phone by pressing and holding the top and home button until the screen goes black. Once the screen has gone black, try starting it normally by pressing the top and Home buttons for 1 second.

Check whether the storage option is selected to memory card or not in camera settings... Try it...

My screen turns black and the TV goes into standby mode (I get an Amber Light) within 3 seconds after turning the TV on.

There's a menu in Options to continue/resume using the camera when it's on standby.
Go into the menu and reset the phone to original settings, (You might loose all your data). Or try switching the phone off and taking the battery out then leaving the phone alone for 1 hour.

Press the volume button on the side of the phone to display a screen similar to previous Sony Ericsson Cybershot phones during standby mode. It will display the time and a message icon. This is probably an energy saving feature when the screen goes black in standby mode, but you must press the volume button to get to that screen.

this problem due to track open in the flexi cable(slide strip).please try to change it

first check the iris of the camera if it is opening,you will see this when you look inside the lens of the camera when you turn on and off the switch at camera mode if the iris is opening....if the iris is ok the second problem may occurs of your camera is the ccd image sensor....

hya i would say that you need to take the fone back to where you bought it as for the battery thats just how mine is and my friends got the same fone and it does the same.