I have D90 dslr camera last few months was working very fine but last days its shutter not opening propely after click only half image show

Take care. Nikon does warn every user of the modern DSLR's not to use old flash guns. Old camera's were fitted with mechanical switches. In those days nobody cared about 5, 12 or even 100 volt on a flash gun. Modern camera's use electronic switches (transistor) and they only can survive when hooked up to modern flash guns, because these guns block high (above 5 Volt) voltages.

Try another lens. Make sure the camera is set to AF.

R13 is not an error message - the camera is telling you how many images you can take before the camera has to stop and write to the memory card. Please consult your users manual for further information

Since a couple of months, my "out of warranty" D90 is having a problem.

Even after shutting down the unit , sometimes (post of the time) the green led is blinking (at random speed) untill the battery is 100% down (after half a day).
Switching memory card , or formatting memory card does not help.
Even without lens , problem occurs.
I tried also a other battery pack , same problem...

Anyone has an possible reason why this happens , or a 100% working solution.

PS: D90, battery packs and charger are 100% genuine NIKON.
Regards, Rik

Have you removed the lens and watched the inside while you fire off a few shots? Does the mirror flip up....does the shutter really open?

Try removing the lens. Turn it on. Press the shutter a few times. Re-attach the lens and try it.

Having gone over a month without a response, I assume this is no longer a problem.

Try a diff lens on the D90 to see if its the body or the lens. Tony

you have see first visible damage. However camera should be dropped. D90 is not magnesium case.

bring it to your nearest nikon shop for a check up. i suggest a mirror lock up / shutter error.

Just clean propely with genuine cotton cloth ,it may work fine .