Camera turns off

If the shutter has 100K operations then the camera may be due for a replacement (not worth repairing).

Please make sure you have a fully changed battery in the camera. If the camera does not have a battery icon anywhere showing a low or dead battery then you have a camera that should be sent to a Nikon Authorized service center. They can clean and repair your camera. They will; QUOTE the repair before you pay. All you are out is shipping costs.

Sounds like a loose screw inside shorting out one of the curciut boards! tccamerarepair.com

Clean the battery holder with a pencil eraser, otherwise go for good brand rechargeable battery AA 2700 mAh try it.

[source]Question about Samsung Digimax S500 Digital Camera[/source]
Try replacing batteries (high Ah photographic type).
The lens motor & electronics may be draining power if Ah capacity has dropped too low. At night, it could be that your flash is trying to fire (another drain), or shutter timer / mirror staying open longer.

Hello, I went and researched a few points in the manual and hope this helps to some extent. If this doesn't help, try resetting your camera by removing the batteries for 30 seconds, then reinstalling them and turning on the camera again.
Monitor is blank:
• Camera is off.
• Batteries are not correctly inserted or battery-chamber
cover is not properly latched.
• Batteries are exhausted.
• EH-62B AC adapter (available separately) is not properly
connected.
• Camera is in sleep mode. Press shutter-release button
halfway.
• Monitor is off.
• USB cable is connected.
• AV/Video cable is connected


No picture is taken when shutter release button is pressed:


• Camera is in playback mode.
• Batteries are exhausted.
• Red (!) lamp flickers: flash is charging.
• Green (AF) lamp flickers: camera unable to focus.
• Message "CARD IS NOT FORMATTED" appears in
monitor: memory card is not formatted for use in your
camera.
• Message "OUT OF MEMORY" appears in monitor:
insufficient memory to record picture at current Image
mode setting.

Hello, I went and researched a few points in the manual and hope this helps to some extent. If this doesn't help, try resetting your camera by removing the batteries for 30 seconds, then reinstalling them and turning on the camera again. 
Monitor is blank: 
• Camera is off.
• Batteries are not correctly inserted or battery-chamber
cover is not properly latched.
• Batteries are exhausted.
• EH-62B AC adapter (available separately) is not properly
connected.
• Camera is in sleep mode. Press shutter-release button
halfway.
• Monitor is off.
• USB cable is connected.
• AV/Video cable is connected


No picture is taken when shutter release button is pressed:

• Camera is in playback mode.
• Batteries are exhausted.
• Red (!) lamp flickers: flash is charging.
• Green (AF) lamp flickers: camera unable to focus.
• Message "CARD IS NOT FORMATTED" appears in
monitor: memory card is not formatted for use in your
camera.
• Message "OUT OF MEMORY" appears in monitor:
insufficient memory to record picture at current Image Mode selection.

1. Press the WB / Func button.
2. Scroll down to the Drive Mode icon (usually a single rectangle)
3. Scroll over to select the Clock/2 or Clock/10 icon (2 second or 10 second delay)
4. Press Set (on the multicontroller button)

Now, when you press the shutter button, the camera will delay 2 or 10 seconds before taking a picture.

To return to normal, follow the steps above, but select the rectangle icon (single shot) in step 3.

You can download a manual (Camera User Guide) for your camera here.

Ifd the camera is only 3 months old - return it for replacement

If you check page 45 in the manual, you'll see that the orange light during the half press indicates that the flash is turned on. A single beep means that the camera is having difficulty getting a "focus lock" (usually when shooting in low light conditions). See page 100 of the manual for suggestions on how to improve the chances for getting a well-focused picture.

The shutter button features a two-stage action. Pressing Halfway Pressing halfway automatically sets the exposure, focus and white balance.
The indicators light or blink as follows.
Upper Indicator
" Green: Metering complete (two beeps sound)
" Orange: Flash will fire
" Blinking Orange: Camera shake warning / Insufficient exposure
Lower Indicator
" Yellow: Macro Mode / Manual Focus
" Blinking Yellow: Focusing difficulty* (single beep sounds)
* When the indicator blinks yellow, lock the focus before shooting.