CANON REBEL XT -CF card error

check for bent CF pins

CF stands for compact flash which means you have an error with your memory card. Try removing and replacing your compact flash memory card. If that doesn't work you may need to format your memory card or replace it.

there is cf unit faulty might pins are bent or damage and could be come out from board that why giving cf error and err99

1. Test the CF card on your computer or another camera. If it works fine then it may not be the card. Make sure the card is not UDMA, 4GB or more in memory size since those new big cards are not compatible with the older cameras.
   
2. Look inside the CF port. Make sure that none of the contacts that connect the camera and CF card are bend of smashed flat. If so then the camera will have to be send off for repair. This is a rather expensive repair, $250 is not uncommon.
3. I it is neither of these then take the camera to a local camera shop and ask them to look at it. It may need to be sent off, but testing another brand card, or resetting the camera or checking for physical defects couldn't hurt at this point.
   

It sounds like a bent pin in the CF slot. This is not a do it yourself fix. Take it to a repair shop.

error 99 can most times be remedied by taking a standard pencil eraser and carefully cleaning the gold contacts at the back of the lens and the gold maching contacts in the lens opening of the camera... BE CAREFUL not to let eraser crumbs into your camera... keep it clean... reset the battery and give it a whirl.... did it solve the 99 issue?
for the CF it refers to the cf card... here's what I've found on this:
Canon reports that this error code may appear on your digital camera’s LCD (liquid-crystal display) when there is an error reading from or writing to the inserted CF (CompactFlash) card. This error code occurs most often after a user has tried to eject a CF card before the camera has finished writing data to the card.Solution:
Canon suggests that you first try to use a different CF card. If you do not see the error message when you use the new CF card, the first card is probably damaged.

Before you take the next step, drag the files from the CF card to a location on your hard drive to back up the files. Next, you can use Windows’ ScanDisk utility to check the CF card for errors. If you use a Mac, you can use Disk Utility (in Applications\Utilities\) in OS X.

If ScanDisk or Disk Utility fails to resolve the CF card problem, insert the CF card in your camera again. Then format the CF card. On most Canon cameras, you can do this by pressing the Menu button, selecting the Format tab, highlighting Format, selecting Format, and choosing Yes. Make sure you have backed up the data on the card before you do this. Formatting the card will delete the images from the card. After you format the card in your camera, use ScanDisk or Disk Utility to check the CF card again. If you still encounter errors while using ScanDisk or Disk Utility, you should discard the CF card because it is damaged.

If the error still occurs after following the steps above, your camera may need repair. Contact Canon’s technical support for further assistance.

hope this solves your issues....
let me know
K

Nope, this is not card anymore.

As you know CF is card failure, sometimes this cause to start error 99 , that is lens error , even if there is no problem with the lens.

This happens because the built in software in the camera can get messed up after an error CF.

You fix the problem calling Canon, they will guide through upgrading the firmware in your camera.

First ensure that you are using the camera menu and command to format the new card, and that new cards are properly inserted into the machine.

Call Canon support to get a firmware upgrade.

You've probably gotten bent pins in the camera. Has to go to the shop.

Observe the connector inside camera, using a flashlight. If there is a bent pin take the camera to service immediately. Don't turn it on any more as we did in one similar case - creating a short circuit that damaged the camera electronics and voided the warranty.

If no visible problems, remove battery and leave it out overnight.

Check the volume and speed of memcard, maybe it is not compatible. error 99 is an indication that a lens or shutter curtain is not working, so i cant see any connection with the memcard problem. Check your camera memcard compatibility.