Flash not automatically opening up.

flash will pop up automatically only in auto mode,just change to auto and see

First look at you mode dial on the camera and make sure it is not on the setting with a picture of a flash with a cross through it. If that doesn't work in your menu see if the flash is disabled. Note: When On A Manual Mode You Need To Manually Pop Up The Flash

Be aware that the built in flash does not pop up automatically in all picture modes. Try it when in the different modes (on the mode dial) and see what I mean. Does it popo up when manually opened ?, (small button on front left hand side of the viewing pentaprism/flash housing.)

Try turning camera on,
Then press both Green buttons for a count of 10. This should restore factory reset.

Some models also have a reset button under a connector flap, or go into your menu. Under Custom Setting Menu, choose Menu Reset.

One of these methods should work.

I have the D40x. Only thing i can think of is the little sensor thing on the front down and to the left of the release button. If you have your finger over it, the flash don't work and the focus won't work right. "Infrared assist" in the manual. Myself, I use the sb400 strobe flash cause the popup flash uses too much power from the camera battery.

If the camera is in auto mode, the flash opens anytime the camera feels that it cannot take the picture with only ambient light. You can overcome this by closing the flash once the camera opens it or using a manual mode. In manual mode, the flash opens only if you press the flash button on the left side of the flash housing.

This is a common fault with the D40x. You will need to contact Nikon for repair details.

Sounds like flash board is bad, Needs to fix by a repair shop.TC

If it's withing 30 days, get it exchanged. I have a D70s and it's been working fine for me, maybe something with the D40x with other customers? Take it back to the store and let an "instructor" try it out to make sure it's not a setting.

It's great for the manufacturer to know about any problems so they can get a good sample of problems to help many people. Good luck.

Using the flash When shooting with the built-in flash, open the flash manually. The flash does not pop-up automatically. The flash will not fire if it is closed. The flash will work when it is opened up. When the flash is open, the (flash on) icon or (automatic) icon will appear on the LCD monitor (or in the viewfinder). Flash on: The flash fires in every shot. Automatic: The flash fires automatically. Press the (flash) button to switch between the and flash modes while the flash is open. In some shooting modes, the flash mode does not switch even if the flash button is pressed. Please refer to Functions Available in Each Shooting Mode in the Camera User Guide provided with your camera for more information. When you are not using the flash, close it manually. When the flash is closed, the flash will not fire and the icon appears on the LCD monitor (or in the viewfinder).