iFixit - Answers With Device "Canon SX40 HS camera"

Canon SX40 HS camera: What do I do , how do I fix it

Sun, 04 Mar 2018 02:55:37 -0700

My camrea is saying leans error camera will trun off restart camera

⟐ Answered March 04, 2018 at 2:55 MST

Canon SX40 HS camera: Why doesn't my camera want to go on?

Wed, 13 Jul 2016 04:38:09 -0700

My camera doesn't want to go on even though the battery is fully charged. The lens is also halfway out.

Canon SX40 HS camera: Must Remove the battery & then reinstall it to get camera to turn on.

Sun, 01 Dec 2019 11:11:01 -0700

My Canon Powershot SX40 HS camera will turn on only once per battery insertion. i.e., put battery in, the camera turns ON OK. Turn camera OFF, then press the On/Off button and the camera will not turn on a second time. Take the battery out, put the same battery back in, press the On/Off button, and the camera turns ON and everything works fine again. Turn it OFF once more and it won't come back on until the battery is removed and then reinserted (same battery). I've also found that once the remove/insert battery cycle has been performed (i.e., camera now ready to turn on), pressing the Playback button will turn the camera on, just like the On/Off button does.

Does anyone have any idea as to what is causing my camera to act this way?

Incidentally, I do not have any history with this camera -- I just recently (April 2017) bought it used. Since it did not come with a battery, I bought a supposedly compatible Vivitar VIV-CB-10L battery; the manufacturer's battery is a Canon NB-10L. Once the camera is On, it seems to work perfectly so I think the Vivitar batteries are OK for the camera.

UPDATE 04/30/17 -- Since originally posting my question, I've learned that once a fully charged, installed battery's charge becomes even slightly depleted (say the battery status icon lights only two of the three divisions of the icon), the camera will power on consistently, just like it should, without me having to remove and then reinstall the battery between power on's. So I'm slowly uncovering more symptoms but still cannot formulate a diagnosis. All thoughts will be appreciated.

Oh, and I have purchased a genuine Canon NB-10L battery (from B&H Photo) but still have the problem.

UPDATE 07/16/17 -- EUREKA! I found the culprit -- my aftermarket (cheap) battery charger was overcharging my camera batteries to 8.4 volts. Apparently the camera's electronics have an "overcharged battery" threshold of about 8.2 volts. If a battery is installed with a voltage above the threshold, then the camera will not power up again until it senses that the battery has been swapped out. (It has to turn on once in order to sense an overcharged battery; that's why I was having to remove the battery and then reinstall it to get the camera to come on just the one time per battery swap.) Of course, if the replacement battery is also overcharged beyond 8.2 volts, the "new" battery will only give you one turn on cycle of the camera, too. Since I was using the SAME battery when doing the battery "replacement", even turning the camera on just once would dissipate the battery's charge somewhat. Eventually, repeated uses of the "Install battery/turn camera on/turn camera off/uninstall battery/reinstall battery/turn camera on" process dropped the battery's voltage to below the camera threshold of 8.2 volts, and at that point the camera would begin to operate normally. Though my theory is only conjecture as to what logic is actually built into the camera, I do know that using a properly charged battery allows my $10 camera to work normally. Needless to say, I've abandoned the aftermarket charger in favor of a genuine Canon charger that I bought for charging my NB-L10 batteries.

⟐ Answer accepted December 01, 2019 at 11:11 MST

Canon SX40 HS camera: Flash tube replacement bulb

Fri, 28 Nov 2025 06:02:05 -0700

I have a trusty sx40 hs but the pop-up flash stopped working (no flash). I think it can be the flash tube but I cannot find a place where I can purchase a new one. If I maybe have the part number it can make it easier to find. Can anyone help me please. Thank you.

⟐ Commented November 28, 2025 at 6:02 MST

Canon SX40 HS camera: My camera mainboad is damaged. Where can I get it?

Tue, 02 Apr 2019 00:07:07 -0700

I have canon powershot sx40hs, one day suddenly it stopped working. When I sent it for repair, person told me Its mainboard is damaged.

Where can I get its Mainboard.

⟐ Answer edited April 02, 2019 at 0:07 MST

Canon SX40 HS camera: How can I replace the SD card reader? (Memory card error)

Tue, 09 Aug 2016 07:01:28 -0700

My camera was taking great pictures & I had just uploaded my photos & replaced the card in the camera when I had a message on my screen saying "Memory card error". I have tried other cards, looking to see if the metal/gold colored wire is in place to connect with the card, etc....I have also used canned air to blow-out any dust, dirt, sand, etc....from the card slot. Nothing has worked...Other ideas other than replacing the card reader slot ??

I LIKE the photos I got from this camera & would like to try & repair it ! Please help ??!! Thanks ~~

⟐ Answer deleted August 09, 2016 at 7:01 MST

Canon SX40 HS camera: Canon SX50 HS half of a picture covered up by something in the lens?

Sat, 23 Feb 2019 10:54:28 -0700

I have a Canon SX50 HS and I was taking a timelapse with CHDK. I came back to the camera and it looked the last of the pictures had something blocking them. More than half picture looked like a blade of grass was in the way. I took out the memory card and the part that was blocked was still there.

Does anybody know what's happening? And how can I fix it?

⟐ Edited by author February 23, 2019 at 10:54 MST

Canon SX40 HS camera: Zoon in/zoom out very slow

Fri, 08 Jun 2018 13:09:43 -0700

while zoom in and zoom out, the lens movement is very slow.