Nikon P4 Will Not Power On

make sure the battery is fully charges and hold down the power button and it will power on

have you tried replacing the batteries, holding down the power button

Is there anything to suggest why it wouldn't start.

Any blinking lights or error messages?

Please let me know and I can further diagnose this problem better.

There is a gear drive that moves the lens, so you may have dislodged the teeth of the gear. There are several things you can try to fix this problem. First of all, make sure the battery is freshly and fully charged. and the camera is off. Remove the memory card, hold the camera (lens pointing down), press the replay or image review button and hold it down then press the Power On button. That does a hard reset on many Nikon cameras. Release the buttons after the camera powers up. Try the lens to see if that fixed it. If it did not, power the camera off, plug the AV cord into the AV jack, hold the camera with the lens down and power the camera on. Having the AV cable plugged in prevents the screen from powering up and gets more power to the lens motor. If this still doesn't fix the stuck lens there are three more things you may try. Hold the camera with the lens down and power off. Press the shutter button down, hold it, and then power up the camera. If there is movement and the lens still doesn't come all the way out, try this a couple more times If there is no success, the next two attempts should be tried knowing they may damage the camera more, but also may fix the problem. If the cost of repairing the camera is close to or exceeds the cost of the camera, these are worth a try. Remove the AV cable, power down the camera. holding the camera by the sides on one end, lens pointing down,
press the power on button and immediate strike the camera into your cupped empty hand fairly hard several times. See if that freed the lens. If not the last try will be the same except this time place a handkerchief folded several times for padding on a table or desk top and strike the free end of the camera on the folded handkerchief fairly hard to try to dislodge the lens. The only other
thing I could suggest you trying as a totally last resort would be to remove the battery and try to gently pry the lens up a little at a time moving the pry tool around the lens a little at a time. If you can raise it to the point you can grasp it, pull it to the extended position and make sure it is straight, rock the lens a tiny bit left to right and see if you hear a click. Sometimes that will reset the pins. Good luck. If none of this helps, you are going to need a new camera.

go check the placement of battery, see if polarity is properly follows.
if hardware issues, remove first the ssd card, then turn it on. see if this unit turns on.

let me know.

Are you sure the camera battery of the Nikon Coolpix P4 is well and power of you camera is full,If it is still happen to this problem,reset the mode of it to normal or ask for help at the Nikon Home Network.

Hello

The problem is that the lens has become stuck in the barrel. There are some DIY solutions you could try, but the probability is that you will have to get it fixed by a professional.

Use these at own risk as it may further damage the camera.

Firstly , try connecting your ac adapter or usb cable.

Try holding the shutter button while switching on the camera.

Look at the lens , and if some of the lens 'circles' is misaligned or not concentric then try wiggling it (while holding camera lens down).

Try gently pushing or pulling the lens when it extends but this is risky as it may cause the lens barrel to slip out of its guidance system.

Another way to do this is to place the camera lens down on a hard surface and then power it up. Be sure to use a soft cloth or something similar as to not scratch your lens or casing. Let the lens push the camera up and down a few times and sometimes the little resistance provided by the camera is enough to get things going again.

Try hitting your camera near the lens on the body with the soft tissue on the palm of your hand.

Other than that , I would take the camera to a repair center for a evaluation to see if it would cost more to repair than to replace the camera.

If it is still under warranty I would suggest you take it in before trying any of these steps and remove any off-brand batteries or accessories as some stores are really fussy about warranty repairs on camera's with non-brand accessories.

You can also have a look at THIS link.

Hope the advise is useful. please do not hesitate to let me know if you need any further assistance.

Regards
Andrea

the little white peice is what holds ur battery cover closed i think, so without a closed cover it cant really function. i think so anyway

No lights or anything?

Best I could offer at this point is check the battery contacts are clean, use a pencil eraser or a cotton bud (Qtip) moistened (not wet) with isopropyl alcohol (tape/stylus cleaning fluid) and check the battery door is properly closed...

same problem as sam and dmouse

only solution to turn ur camera on is to get that plastic fixed coz it is slided when u close ur battery cover to connect the power on.without it circuit is broken and camera cant be turned on.