CF card reader repair – CHA error
After replacing the damaged CF card pins on Nikon D700, you may still have a problem such as “CHA” error message.
This can be caused by the card VDD switching transistor (shorted out)
Unfortunately, the service manual does not say any information about this transistor.
What I did was, pulled similar transistor from a Canon Rebel XT main circuit board and replaced it. then worked without any error.