EOS 5D Mark III Producing Corrupted Images

[Cailinnua]

I have a Canon 5D Mark iii camera which keeps producing corrupted images as attached. There is no pattern to these images being produced, I am using the same lens and settings and might take 200 images with 3 corrupt and 30 with 10 corrupt. I have attached a sample of images being produced. Sometimes they have these colour blocks, sometimes less or more of the photo is covered, and sometimes black 

[Tronhard]

Hi Calin and welcome to the forum:

Just before this began to happen, has anything changed?  For example any settings, different cards etc.

The first things I would suggest are the least invasive:
1.  Do full camera reset to default settings:  If you want to save your current configuration, save it to one of the C1-C2 custom settings.

2. Try different cards.  You may have a corrupt card

[Cailinnua]

Hi Thank you for your reply, I have tried a number of different cards, I haven't reset will try that now

[deebatman316]

Do you see the corrupt images in live view why using the rear LCD Screen. If so your image sensor maybe is on its way out.

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT & 600EX II-RT

[Cailinnua]

If this is the issue can the image sensor be replaced?

[Tronhard]

Did you do a reset on the camera yet?  It may solve your issue for no cost.

[deebatman316]

I was under the impression that OP had reset the camera to factory . Since they mentioned the use of other memory cards.

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT & 600EX II-RT

[Tronhard]

I did ask and they have not confirmed that and they responded that it was something they would try when I suggested this. "Hi Thank you for your reply, I have tried a number of different cards, I haven't reset will try that now"

[Cailinnua]

I'm trying to figure out how to reset the camera sorry for delay 

[Tronhard]

Have you downloaded a copy of the manual for this camera?  I strongly recommend that as it is the first port of call for any issues.  You can find it HERE - look on P56.