Canon Rebel XS resets Auto Cleaning to Enable after power off and shows Err 99
Asked 6/26/2011
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2 answers
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My Canon Rebel XS shows Err 99 only after this sequence: insert a fresh battery, turn the camera on, take one or more shots, turn it off, turn it back on, then press the shutter. I tried common fixes like cleaning lens contacts and recharging the battery, but the issue remains.
I also noticed that if I set Automatic Sensor Cleaning to Disable, the setting appears to save until I power the camera off. After turning it back on, the camera shows Auto Cleaning as Enable again.
What would cause a setting like this to be lost after power-off, and could it be related to the Err 99 problem?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
15y ago
2 Answers
1
Since the settings get lost after switching off, have you tried changing the lithium battery (the one for date and time)? For my EOS it's the CR2016 model.
The following link suggests to check the secondary battery, too:
Turn off your Canon 1000D and remove the memory card, lens, battery and time/date secondary battery. The secondary battery is a small, round battery about the size of a dime found in the same compartment as the main battery. It is located in a vertical slot. Slide out the secondary battery by pressing your finger on the battery and pulling it toward you.
I will add that I have never tried it personally.
Originally by user5032. Source · Licensed CC BY-SA 4.0
user5032
15y ago
0
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If the Rebel XS is forgetting settings after power-off, the likely cause is the small internal backup/date battery rather than the Auto Cleaning feature itself.
That battery keeps certain settings and the date/time memory when the main battery is removed or the camera is powered down. If it is weak or dead, settings may revert unexpectedly, which matches your observation that Auto Cleaning returns to Enable.
So yes, this is a reasonable path to investigate. Replace/check the camera’s secondary lithium battery (commonly a coin cell such as CR2016 in similar Canon models), then retest. On this model it is in/near the main battery compartment in a small slot.
Err 99 is a generic fault, so this may not be the only cause, but a failing backup battery is the clearest explanation for settings not sticking after shutdown.
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