Question about Canon CanoScan LiDE 500F Flatbed Scanner

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Canon LIDE 500F scanner does not scan - returns error message about releasing lock switch, detaching interface cable and reconnecting

Scanner does not scan - returns error message about releasing lock switch, detaching interface cable and reconnecting...Scanner driver will be closed. Error code 2,179,0.

The only time it has started a scan it has moved only 1 cm before returning to the "docking position" and displaying the above message.

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  • lwurn Apr 23, 2008

    just wrote you guys!

  • Anonymous Jun 13, 2008

    the same



  • Anonymous Aug 12, 2008

    Have already done what's been recommended: checked the lock switch (it wasn't locked), flipped it back and forth several times, left it unlocked. Disconnected the cable and plugged back in; got an anemic sound twice when I did this. Then nothing. Bought a new USB cable. Nothing.

  • sepukufuku Oct 13, 2008

    i have the same problem. I was trying to scan through photoshop and my lock switch is definitly unlocked and was never locked when i got the message. also when i do a preview scan the first third comes out fine and the rest is just lines and garbage.

  • Anonymous Oct 30, 2008

    Exactly the same error message about the lock switch. Tried everything except replacing the USB cable with no success. Very disappointing;scanner was working perfectly, this problem came out of the blue. Scanner less than two years old and only received light use.

  • THEZOCMAN Nov 05, 2008

    Have tried unlocking it. Have tried everything. Will not work. I have a G5 Mac 10.5.5

  • Anonymous Dec 29, 2008

    I have the same problem. My OS is Windows XP.
    Scanner was work very good about 1 year, and than suddenly stopped.
    Message: - Error in scanner (code 201);
    and: - Unable to open TWAIN source.
    I try un install and reinstall driver from CD - nothing.
    I install new driver (from Canon website) - nothing.
    I reinstall my Windows XP - nothing.
    I install scanner on PC of my friend - it work => so scanner and cable are correct.

  • Anonymous Dec 30, 2008

    i have the same problem as them...its not working

  • shaftmonde Mar 05, 2009

    Same here. Scanner worked beautifully, then stopped with same message. It's definitely unlocked. I took it all apart (yes, it can be done) and there are no obstructions. Software updates don't help either.
    My conclusion is that it needs a new motherboard - or whatever the PCB is called, but I don't think any are available.


  • Abhinav Kumar Sep 16, 2013

    I too had a similar issue, and was quite frustrated by this. But I checked for some solution over internet and figured that these models have some minimum value of power required. So checked my PC too had different USB jacks with different powers. So I tried them in different jack and it worked. So try the scanner in different PC USB jacks and do not connect this scanner using and USB hub. Hope this helps !!

  • Abhinav Kumar Sep 16, 2013

    I too had a similar issue, and was quite frustrated by this. But I checked for some solution over internet and figured that these models have some minimum value of power required. So checked my PC too had different USB jacks with different powers. So I tried them in different jack and it worked. So try the scanner in different PC USB jacks and do not connect this scanner using and USB hub. Hope this helps !!

  • Abhinav Kumar Sep 16, 2013

    Abhinav Kumar I too had a similar issue, and was quite frustrated by this. But I checked for some solution over internet and figured that these models have some minimum value of power required. So checked my PC too had different USB jacks with different powers. So I tried them in different jack and it worked. So try the scanner in different PC USB jacks and do not connect this scanner using and USB hub. Hope this helps !!Add a Comment

  • Anonymous Mar 26, 2014

    the scanner does not respond to MP Navigator but with XP i can scan

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I had the exact same problem with another scanner (LiDE 80) after years of use. It stopped being able to calibrate itself so I couldn't use it on computers where it had never been installed on before (since on freshly installed computers, the driver requires calibration to be carried out at least once).

Hopefully my solution will work on the 500F, albeit with some modifications you'll have to figure out yourself. :P

What I did was open it up, the two strips of plastic to the left and right of the platen can be used to remove the glass surface:
1. release the oval catch at the front of each strip by prying them upwards.
2. slide the glass towards the front of the scanner a bit till a gap appears between the end of each strip and the back of the scanner.
3. pry a bit of the back of both strips upwards and keep them away from the glass so they won't stopped by the back of the scanner.
4. slide the glass all the way to the back, you should be able to remove the glass since the two plastic strips aren't blocked anymore.

The reason the scanner fails to calibrate is because it tries looking for the black/white strip hidden between the plastic case and glass panel at the front but fails. There are three possible reasons:

1. Dirty glass panel/damaged black/white strip
2. Covered/dirty CIS module
3. Loose drive belt

Mine was a combination of the first three. A little washing and thorough drying of the glass panel and black/white strip and careful wiping of the imaging element and led strips (the black bar is the imaging element and the white bar is the led strips) fixed the problem.

I didn't have a loose drive belt, so I didn't look into fixing that, but I see a spring loaded catch holding the drive belt tension; if you have a loose belt, it may be worth it looking into that.

A tip of advice: If somehow, after reassembling your scanner after tinkering with it it still refuses to calibrate, you can do a dirty workaround by doing the calibration with the scanner disassembled and placing the black/white strip manually above the CIS module at the front, making sure to hold it steady. Your images will look a bit muted, but at least it works! (I did this step before I reassembled the scanner just in case it wasn't fixed, but thankfully its working now!)

Posted on Jun 29, 2010

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Check the lock switch and make sure it is unlocked. I think the lock switch is on the bottom...or it may be under the lid near one of the hinges. Flip it back and forth and leave it in the unlocked position.

If this doesn't work, then it will most likely need service. Contact Canon Tech Support.

Posted on May 09, 2008

  • Abhinav Kumar Sep 16, 2013

    I too had a similar issue, and was quite frustrated by this. But I checked for some solution over internet and figured that these models have some minimum value of power required. So checked my PC too had different USB jacks with different powers. So I tried them in different jack and it worked. So try the scanner in different PC USB jacks and do not connect this scanner using and USB hub. Hope this helps !!

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I too had a similar issue, and was quite frustrated by this. But I checked for some solution over internet and figured that these models have some minimum value of power required. So checked my PC too had different USB jacks with different powers. So I tried them in different jack and it worked.
So try the scanner in different PC USB jacks and do not connect this scanner using and USB hub.
Hope this helps !!

Posted on Sep 16, 2013

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I had this problem, tried all of the solutions suggested here and other places without success, but now have finally fixed it.


1. Uninstall scanner
2. Cycle lock switch on and off twice, leaving it unlocked
3. Connect scanner to different usb port DIRECTLY on the computer
4. Scan something (it will scan correctly this time)
5. You may now reconnect it to whatever usb port/hub you were using before

Posted on Apr 15, 2013

  • jhakim
    jhakim May 13, 2013

    UPDATE--THE ONLY THING THAT IS NEEDED IS TO CONNECT THE SCANNER TO A USB PORT DIRECTLY ON THE COMPUTER, THEN SCAN. YOU CAN IMMEDIATELY RECONNECT IT TO THE USB HUB, AND IT WILL SCAN PROPERLY AGAIN. I HAVE NOW DONE THIS MULTIPLE TIMES. NO UNINSTALL IS NEEDED, NO PHYSICAL ACTION ON THE SCANNER IS NEEDED.

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I had the same problem.

I followed the steps in one of the solution and did this and it worked!
What I did was open the two strips of plastic to the left and right of the platen. So that we can remove the glass surface:
a clearer description of the whole process.

1. pull the oval shaped catch upwards. Oval shape tabs are at the front end. Pry the 2 strips upwards and remove the 2 strips completely. One on the left and one on the right. The strips are actually stuck on to the glass by double sided tapes so slowly pull them upwards and do not break the 2 pieces of plastic.

2. slide the glass towards the front of the scanner (to where the moving scanner bit is) for about 2cm till a gap appears and the back of the glass can be seen. Slide the glass out and clean it.

3. Make sure that the black and white strip is full black and full white. After cleaning with wet towel, the water droplets caused the image scanned to be off colour as the wet are and dry areas have different tone of white. The imaging part uses the black/white strip as a reference. So any inconsistency will show. Also make sure that the scanning strip is dust free

4. i pushed the imaging part around slightly (2-3cm) to make sure that it works. (i know i'm not suppose to force it around but i was curious) I saw that the lock at the bottom actually locks the moving scan part. So if it locks the scanning part, no wonder it doesn't move. So i unlocked it, open the application and tested it. It started moving and scanning and it worked beautifully! somehow the imaging part moved and returned to the original position so do not worry.

5. Cleaned the glass, the white/black strip start reference and the 2 side strips. Tested the quality on the program again to make sure everything is back to normal. Pasted everything back with double sided tape. Viola!

Thank you guys for shaing and i definitely learnt from this. Hope this sharing help others as well.

Posted on Jan 11, 2011

  • misspebble Jan 11, 2011

    canon 2,179,0 or 2 179 0 scanner

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I had the same exact problem with my scanner. This is how to fix this error.
First, make sure you delete the driver that you probably installed from the CD. Reboot your computer at least twice. On the second boot up- make sure the scanner is unlocked and you have the USB cord connected. I did a registry clean right after I deleted the driver, I don't think that really did much but made my computer a little faster. But it may have helped.
My computer operating system is Windows XP. It appears that when you run the driver on the CD for Windows XP it can't seem to recognize the scanner in windows. So you need to find the driver online at Canons website. Make sure when you download the driver that you get the right one from the country where you purchased it. Then, go into Windows Control Panel, click on Printers and Faxes, below, there is a section called Other Places- Scanners and Cameras. Click on Scanners and Cameras. At this time you will see where windows recognizes the scanner and you will hear it actually connecting!

Posted on Nov 11, 2008

  • Whojo Jan 21, 2009

    I'm telling yah! You DON'T need to send your scanner into Canon to be fixed!!
    The problem for some odd reason is that the operating system CAN"T seem to recognize your scanner anymore. Thats why the error message comes up and ur scanner stops abruptly. Probably due to a software or hardware upgrade since the last time u used ur scanner. I had the same exact problem. I was very frustrated because my scanner was not that old .
    The above solution in my previous post works. I even unplugged the usb for my scanner AFTER I set windows to recognize it again under the control panel and my scanner hasn't given me any problems since. I have been scanning with it a lot lately. So you who like to throw money away-be my guest. This really isn't that hard of a problem to fix. It's so incredibly easy to fix. Windows can't find a device if it's not showing up anywhere- U actually have to show it where it is........then once u do- it recognizes it right away. Yah, I'm an apprentice on here, but I do know a lot about fixing computer hardware and software issues. My line of work entails both. So, when u get the error message and it moves 1 cm and won't do anything. Forget trying anything else but looking to see if the scanner is showing up in your control panel. Under Scanners and Cameras- (Other places) Then hook it up again, make sure the switch is unlocked and u will hear it humming away and ready to do a complete scan!

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