I am not able to take a snapshot through liveview of Nikkon D90? Tried all possible combinations but in vain. Any solution?

Your posting is confusing. On the one hand you say that the problem is with a Nikon 1 camera and on the other hand you are saying that the problem is with a D90. These are two very different camera systems. If it is a Nikon 1, it is a new camera and within the one year warranty. You should contact Nikon on there website. If, on the other hand, it is a D90, the first thing you need to do is determine if the problem is in the camera body or the lens. The easiest way to do that is to switch lenses. If you do not have another lens, go to a camera store and they will probably be happy to let you try one of there lenses on your camera. Once you know where the problem is, we can decide how to proceed.

It's not supposed to. The D80 works as SLRs have worked for half a century, allowing you to frame the picture through the viewfinder. The LiveView capability was introduced with later cameras such as the D90 and D300. On the D80 the display is used for settings, menus, and reviewing pictures after they've been taken.

Press the [Lv] button on the back of the camera above the circular cursor pad to activate the LiveView. For more details, refer to the "Framing Pictures in the Monitor (Live View)" section of the manual (page 43 in my copy).

One source is
http://uscamera.com/1c999-729.htm

No. The LiveView capability is a relatively new development in DSLRs. Nikon first introduced it with their D3 and D300 cameras, followed by the D90 which also introduced HD video capability.

Actually, the LV button puts the camera into LiveView mode. In this mode, you can still take photographs by pressing the shutter release button. To take videos, press the OK button at the center of the multiselector. Stop recording the same way. To get out of LiveView, press the LV button again.

The D90 comes closest to being a straight replacement for the D80. It's a 12MP camera instead of 10MP and shoots videos as well as stills. It also adds the LiveView capability. Other than that, it's almost identical physically and you'll already know how to use it.

If you want to step up, then consider the recently introduced D7000.

Try bestbatt.com

According to the Nikon Support Webpage:

The F-- error message is indicating the camera and lens are not communicating. Either the lens is not designed with electronic contacts, or maybe the lens is not connected fully and clicked in to place. Make sure if the lens is a CPU lens, that it is completely connected onto the cameras bayonet lens mount. You will hear a "click" when the lens is locked in place.

If you have other questions about your Nikon product, you can look up answers here:

http://support.nikontech.com/app/answers/list/p/19

I hope this helps and good luck!

It's a deadly common problem of D90. Fixation:Simply go to the DSLR repair shop and ask them to change the power circuit board of the camera. Will take $60-70 if the board available. Reason of issue:The power control IC get short and feedback the battery power to the battery causing the draining out and other problem like the top LCD back lamp turned ON after turning on the camera. Careful:To avoid this issue in future, after full charge of the battery, do not put it in the camera right then. Wait for the battery to cool down for 5-10 min and then put it in. With the full charge, the battery hold high ampere for a short time. It could damage the power distributor IC suddenly if you put it in the camera right after a full charge. Best, Leo>>from personal experience<<