Camera does not power-up

The Nikon D40 uses the EN-EL9 7.4 Volt Li-ion Battery. You should be able to read 7.4 V DC between the (+) & (-) terminals of the battery after it has been in the charger for several hours. If it does not, it indicates a bad battery, charger or both. There should over 7.4 V DC on the terminals of the charger if there isn't, it suggests a bad charger. If the battery voltage is OK, make sure it is inserted correctly. If still having trouble, it may be related to the camera power switch or internal circuitry. This will require returning to Nikon for repair. Good luck!

This is the Nikon support web page that has the firmware updates for your camera. Current Firmware downloads available for Nikon products Nikon... The D40 is near the bottom of the list. Follow the instructions carefully.

try another new battery, maybe your battery is dead.

Hej,

Du kan ladda ner handboken genom att klicka dessa lankar.

Nikon D40 svenska handboken

Nikon D40 engelsk manual

Tack for att anvanda FixYa.
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Walmart stores still sell that camera. see: http://www.walmart.com/ip/Nikon-D40-Slr-Camera-Kit/5607412
You can also purchase it at Amazon on line. at: http://www.amazon.com/s/?ie=UTF8&keywords=d40+camera&tag=googhydr-20&index=aps&hvadid=4645848837&ref=pd_sl_6lzr40qz09_e

Parts = http://www.bhphotovideo.com/c/search?Ntt=D40+Camera&N=0&InitialSearch=yes
Parts = http://www.porters.com/catalogsearch/result/?q=d40

You can also try Pawn Shops as cameras are gotten rid of all the time.

There is a setting for the flash power on your camera. Refer to the manual to find out how to set the flash power. It is given as Flash exposure compensatinon.

You have to make sure you bought the sigma lens with a NIKON mount. Sigma makes a Sigma mount as well as a Canon mount, of course neither of those mounts will work with your camera. Also you must also make sure your lens is the Sigma 70-300 HSM (/Hyper Sonic Motor) or it will not AF on the D40. I just bought this lens from Abes of Maine and I love it on my D40.

You can but with limitations;
Save me explaining,please read this http://forums.steves-digicams.com/nikon-dslr/137618-sb-25-d40-non-ttl-auto-mode.html

Did you try installing a battery, memory card, and turning it on? Oh, and dont forget to remove the lens cap.

When the camera is in auto focus mode, it will not take the picture until it locks onto a subject. If there is not enough light, the camera will "hunt" for something to focus on. Since it can't define any edges, it won't allow the shutter to release.

The D40 base model does NOT have a powered focus lever for autofocus, so if the autofocus is not working, suspect the lens.