My flash quit working

depending how computer savey you are, you could open it up . clean heat sink and apply new thermal paste to the processor. not too moch, but not too little

I want fix Nikon Coolpix S4150 Point the class can not open

There maybe something stuck in the lens or camera.check the flash whether it is in a normal working.
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Does the flash pop up when you try to take a picture in low light in the Green Box Mode? If the flash does not pop up the problem may just be that something sticky is keeping it down. If it pops up but does not fire, the problem is usually either a bad flash tube or the wiring to the flash has broken where the flash head pivots up and down.
When the flash is fully charged the capacitor retains a voltage of over 300 volts even when the camera is turned off and the battery is removed. I've seen several cameras where the owner tried to repair the flash and ended up burning out the entire Main PC Board.
Bob Kilbourn www.camerarepairs.com

Hello. I also have the same problem as yours - about the flash not working so well. Have you ever gotten a solution to it? Oh, I also had the same camera, Kodak M531. Please tell me if you've already gotten a solution to it. Thank you.

The camera is telling you that the internal memory is full. To get your card to work, you must clear it. With no card in the camera, go into the menu and find "format" and follow the on-screen instructions to erase the internal memory. Then, your card should work unless you formatted it in the computer, in which case you'll have to format (completely erases it) it in the camera.

try cleaning the contacts on the mem card and inside the slot with a q-tip and rubbing alcohol.

The black images with flash mean that the Iris mechanism in the lens is not working properly, and that needs a professional camera repair service.

Best regards,

This sounds like it might be a defective CCD imager. If so, Canon should fix this for you for free, including free shipping both ways. This is regardless of your camera's warranty status. Please check the following two links for more info:
http://camerarepair.blogspot.com/2007/11/canon-digital-cameras-showing-black.html
http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&fcategoryid=225&modelid=13390&keycode=2112&id=29819
Applicable cameras include:
A40, A60, A70, A75, A80, A85, A95, A300, A310, S1 IS, S60, S200, S230, S330, S400, S410, S500, SD100, SD110

U1-U9: these are technician codes indicating that there is a malfunction in the zoom mechanism of your camera, most likely electronic in nature - a defective IC chip and/or bad circuit board. Repair cost would easily exceed the value of the camera. You should be aware that, just as with today's small digital cameras, both mechanics and electronics of smaller point-and-shoot 35mm cameras consist for the most part of light-duty plastic and fragile electronics. If they last a couple of years they're doing well.