What is r27 error code for nikon d50 - Nikon D50 Digital Camera

SOURCE: HI I HAVE a CHA mess in my nikon D50

CHA Error - not as bad as everyone thinks. Here is the solution, the second one has pics of how to fix the problem.

http://www.vandyll.net/?p=499

Then
http://www.stephanmantler.com/blog/d70s-camera-repair/

SOURCE: I have a D50 and it now will not allow me to take

THERE IS A "LOCK" LEVER ON YOUR MEMORY CARD----->UNLOCK IT (when it's locked, you cannot read or write information to it, but the lever is often bumped accidently

SOURCE: how to set the monochrome parameter in nikon d50 dslr camera?

Hi there,
There is no monochrome parameter in the D50 as oppose to the D200. You will have to convert using software.
Hope this helps.
Andrew