cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Canon 90D is nonresponsive.

alv0064
Apprentice

My Canon90D went from working to not working. Wasn't dropped, wasn't jostled. I put a fresh battery in and the red light flashes and the exposure settings show up on top, but I cannot adjust iso/shutter speed/or f stop with normal buttons. The camera will not take a picture, and the LCD screen will not turn on.

Any suggestions?

4 REPLIES 4

5DIV
Enthusiast

Try removing the SD card and see if it responds. Try a new SD card. Try another lens.

Swapped battery, lens, SD card out. Still the same

Did you try another full-size SD card?

Lotus7
Rising Star

If the LCD screen is black, it sounds like the DIGIC-8 processor is not fully running.  The LCD should illuminate even without a SD card installed when you press "Menu".  Can you see any of the exposure or mode info in the optical viewfinder edge displays?   Since you can't access menus a "factory reset" is not possible.

If you're sure you have a good battery installed, you might try this as a last resort before contacting Canon Service (1-800-385-2155):

1. Remove the battery and SD card.

2. Switch the power switch to "ON" and fully depress the shutter button for 10 seconds. Then depress and hold the -> image display button for 10 seconds.  That can sometimes clear stored register errors.

3.  Re-insert a known good battery and wait (don't touch ANY controls or buttons) until the red light stops flashing.

Also, have you looked inside the mirror chamber checking for a mirror that has not returned to it's normal location or a partially jammed shutter leaf?  If the mirror is down, then it's impossible to check the shutter leaf positions or to check for anything caught in the shutter.   Good Luck

Announcements
01/18/2023: New firmware version 1.1.1 is available for EOS R6 Mark II
01/09/2023: Help ensure your autofocus is properly aligned with a Canon Precision Alignment
01/03/2023: Welcome to CES 2023!
12/08/2022: New firmware version 1.0.5.1 is available for EOS C70
12/07/2022: New firmware version 1.7.0 is available for EOS R5
12/07/2022: New firmware version 1.7.0 is available for EOS R6
11/22/2022: New firmware available for EOS R3, EOS R7 and EOS R10
11/16/2022: We're thrilled to be ranked among the Best Employers for Veterans in 2022 by Forbes.
08/31/2022: New firmware version 1.1.1 is available for RF 70-200mm L IS USM
08/09/2022: New firmware version 1.2.0 is available for CR-N 300
08/09/2022: New firmware version 1.2.0 is available for CR-N 500
07/14/2022: New firmware version 1.0.1 is available for CR-X300
06/10/2022: Service Notice:UPDATE: Canon Inkjet Printer continuous reboot loop or powering down
06/07/2022: New firmware version 1.3.2 is available for PowerShot G7 X Mark III
05/31/2022: Did someone SAY Badges?
05/26/2022: New firmware version 1.0.5.1 is available for EOS-C500 Mark II
05/26/2022: New firmware version 1.0.3.1 is available for EOS-C300 Mark III
05/10/2022: Keep your Canon gear in optimal condition with a Canon Maintenance Service
05/05/2022: We are excited to announce that we have refreshed the ranking scale within the community!
04/26/2022: New firmware version 1.0.1.1 is available for EOS R5 C
03/23/2022: New firmware version 1.0.3.1 is available for EOS-C70
02/09/2022: Share Your Photos is back!
02/07/2022: New firmware version 1.6.1 is available for EOS-1DX Mark III
01/19/2022: READY FOR ANYTHING EOS-R5 C
01/13/2022: Community Update. We will be retiring the legacy profile avatars on 01/20/2022. Click this link to read more.