I have problem with microdrive (4G) with my D200. 2 are working, the other not. Can read CHA on top display. I can format on my computer and copy etc. I do format on the camera, but at the end, always the same message: CHA
Are they all the same firmware version - somewhere on the microdrive it should state the version number - if they are all the same number than I suggest you have a defective drive - the others work, so it is not the camera. Could be something as simple as the connections are not being made good enough - try cleaning the connections and making sure they look like they are all "intact".
I assume by "microdrive" you mean the compact flash card - right? Not all compact flash cards will word with the D200 - what is the brand of each of the flash cards you have (and are they all the same-purchased at the same time)?
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When a Memory card is inserted into a D-SLR camera, the camera checks the card for compatibility and usability. There are three possible results of the test:
1) Camera detects valid Memory card, displays number of remaining images in top LCD
2) Camera displays "FOR" in top control panel LCD. The camera has detected a valid disk partition map, but was unable to read the first sector of the Memory Card. Formatting the memory Card using the cameras format option, should resolve this condition and allow the Memory card to be used.
3) Camera displays "CHA" in top LCD. The camera has detected an invalid partition type or is not working properly. Reformatting the memory card may allow it to be used. If an approved memory card causes the camera to display the "CHA" indicator contact the memory cards manufacturer for assistance.
(Nikon's list of "approved" memory cards can be found here.)
Please note that the default disk format used in Windows XP is FAT32 and if a card is formatted with this setting on an XP system, a D1 series camera will report "CHA". Reformat the card as "FAT" to use in the D1 series camera.
When the CHA error is shown, typically the camera will freeze and require that the battery be removed from the camera before it can take another picture. After that picture has been taken, the camera freezes up again for many owners.
Some owners have success removing and either re-seating or inserting a new memory card in the camera.
Some owners have success clearing the error by removing the lens and then reinstalling.
The key to these "fixes" is that they don't all work for everyone. You might need to return the camera to Nikon for repair. You can arrange for Nikon service here.
I hope this helps and good luck. Please rate this reply. Thank you.
When you insert the card and get the CHA Flashing error, remove the card and format it. Reinsert it again. Should work.
Also, if it doesn't work, there is a strong possibility there's a
broken or bent pin in the memory card section of your camera. Just look
closely and inspect that section to see if there's a broken or a bent
pin. This happens when you forcibly insert the card the wrong way. This has happened to a lot of users.
3) Camera displays “CHA” in top LCD.
The camera has detected an invalid partition type or is not working
properly. Reformatting the memory card may allow it to be used. If an
approved memory card causes the camera to display the "CHA" indicator
contact the memory cards manufacturer for assistance.
note that the default disk format used in Windows XP is FAT32 and if a
card is formatted with this setting on an XP system, a D1 series camera
will report "CHA". Reformat the card as "FAT" to use in the D1 series
The D200 uses a different way of changing the aperture than on that old lens. Set the switch to 22 and lock it with the little lock just above it. It always has to set like this. Now the D200 will stop complaining.
I had the same problem and thought I had looked closely at the pins in CF slot but after finally taking it to a repair shop, the tech showed me a bent pin. It really wasn't that apparent first time around. He told me its a common problem as long as they use the CF cards. I had the pins replaced and my D100 is working great. Best of luck.
If that didn't solve your issue, you may have to go to an authorized Nikon dealer to have the camera reset. The internal battery cannot be serviced by untrained persons. I would also suggest that going forward, you carry your camera inside your coat when you're outside in cold weather, since electronics are easily damaged (especially software) by frost and / or water vapor which can very easily damage parts of your camera (hardware and software) in any weather.