Nikon d70s not working with any cf card

I found similar problems and some good ideas for the d70 at this site.
http://photo.net/nikon-camera-forum/00F3Nf

This may be related to the CF card being used. The Nikon D70 and D70s are an older technology and supports most cards up to 1 GB in capacity. It can support a very limited number of cards up to 4 GB in capacity. Nikon has a list of support cards.

The list is old and I myself have used other brand cards without a problem - as long as they did not exceed 1GB in my old D70. I imagine many 2GB cards would work but beyond that - I would want to venture. Of course, sticking to the list is a sure bet.

Of course, it may just be a "bad" card - or it could be bent connectors in the camera - but it is unlikely unless you've forced a card into the slot in the past. Try with another card to be sure.

Please rate this reply - good luck!

Look inside the slot...are any of the pins bent?

CF Card reading error.  Usually cheap cards, can be bent/tarnished/worn pins inside D70, this part can be replaced.

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

Then read
http://www.stephanmantler.com/wordpress/d70s-camera-repair/en/

The very first thing which you should try is another CF card. Preferably a brand new one (not Lexar 80x, see below), but if not then use one which has been freshly reformatted in another Nikon DSLR.

ziggy53 on the Digital Grin forum posted an answer to this question two years ago. As I cannot put it any more clearly or succinctly his posting is reproduced as follows:-

"It appears that a Nikon D70/D70s CHA error is a general "cannot writeto card" error and can be caused by many different situations including:

1) CF card fault/failure
2) CF card fragmentation
3) CF connection, camera contacts
4) Camera internal failure with card write circuit board
5) Power supply in camera, potentially also related to the battery.

To rule out the Compact Flash card(s) as the fault, try a brand newcard (not Lexar 80x, as those seem problematic), format in camera anddo not field erase images. Reformat card in camera to start over. Ifthis procedure works, format the older cards in the camera and thenwork the cards by taking images, preferably RAW to fill up the card asquickly as possible. Do not completely fill the card but stop at around10 remaining images and format the card in camera once more. You mightbe good to go.

If these procedures don't work, it is recommended to return the camerato Nikon for a checkup. If Nikon cannot diagnose a problem, you mighttry a new battery as some claim a weak battery to be part of theproblem, but I don't see that "cure" mentioned often enough to know ifreally is a cure or not.

Repairs for an out-of-warranty repair for the problem relating to thecamera seem to run around $300USD from those few folks who reported acost."

All credit to ziggy53 http://www.dgrin.com/showpost.php?s=e7ff151930f88761a5feaa2e0348446c&p=710857&postcount=8

I've experienced this problem on a few D70 and D70s models and the advice ziggy53 gives has proven to be right on the mark; to Nikon's credit I've also found that in every case where I've definitely eliminated the possibility of a CF card failure they have attempted out of warranty repairs on a goodwill basis: all I had to pay for was for tracked and insured shipping to Nikon and they paid to return them. Of the five or six cameras which I've sent back so far only one had the problem re-emerge albeit in a less serious and very infrequent form. By then I'd given the camera to my niece and she's decided the fault is not serious enough to warrant sending it back again.

problem in card holder replace it

Yep, I solved mine by replacing the CF Pins at the bottom of the slot.  

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

and then here for pics on how to do it:
http://www.stephanmantler.com/wordpress/d70s-camera-repair/en/

You would have to get an SDHC to CF adapter which could be pricey and they are hard to come by.

The card may have pushed the pins through the back of the circut board inside the camera (a semi common issue) or they may require cleaning (with some contact cleaner or rubbing alcohol in a q-tip/cotton bud).

Check for corrosion and/or damage to the pins.

Also, and this may soud stupid, shake your CF card to check for loose internals whcih would indicate damage to the card.

My camera sporadically gave card errors then would flash "FOR" without me pressing anything and would result in corupted image files. This was due to por pin contact caused by a damaged CF card (caused by my dodgy card reader) but in your case the pins or card may be damaged causing a poor connection.

The only solution I have found is purchasing a new card as my pins were ok but my card was damaged. Your situation may require a clean and service and/or repair to the pins.

Good luck!

try another cf card first. if the trouble is still the same,  there is an internal malfunction in the unit, you need pro fix then.. [:0(