Can't operate the camera function

My Lg ku990 does not bring out that camera flashlight when i take pictures. I tried resetting the phone,changing the "ISO" from Auto to function to 800,but still no flashlight. Please help. Your assistance will be highly appreciated.

These codes will work on nearly all Nokia mobile phones.
Soft Reset
A Soft Reset will clear pending errors and bring your mobile phone back to its preset state by restoring the factory settings. To operate this function on your mobile, the code is:*#7380#
Hard Reset
Hard Resets are sometimes needed after the soft reset was performed but the problem was not resolved. Enter the code: *#7370# then press Yes to confirm initialization.
For the Hard Reset, it is recommended that you backup all info, such as phone numbers, contacts and any data you would like to keep.
If the Nokia Mobile Phone will not turn on, press these 3 buttons at the same time: ( on/off) + ( * ) + ( 3 ).

make sure that you have enuf space on your sim for messages , you mite just need to delete some messages

this may be the battery is shorting out . What i mean that the video and camera function draw a lot of power and this causes the ic on the mother board to say hey lets divert all uneeded power to operations and functionality not added features . Hopefully battery replacment may more

look at your phone. on the right side, there is a slide button. slide it to camera mode. now press the camera button you can change to video,photo viewer, or camera mode with the slide button.
hope it helped!

If you mean unlock it as in the idle screen, look on the right side of your phone, above the camera button, the circle button it the way to unlock it. press it twice if the unlock button is what you pressed first to get to the homescreen! hope it helps you :)

when you press on 5mp, you must press the save button at the button right hand corner

1 Without sim phone power on.....
2 Hold camera + Lock button....
3 You will get key pad then write 3845#*990#....
than will ask you if you want to run Virtual Sim press left btn , means OK , no need for reset factory reset will ask you for sec security cod.

call customer care they will help u u would have it on the book when u bought ur fone