I need some advice. I've been a loyal Cnaon user since I started shooting professionally over 3 years ago ( & as a hobbyist before that). Never had a real complaint about Canon or how they handle problems, even when I did have a problem with a product. Any problems have always been solved to my total satisfaction. However...this is fast changing. I bought a new Canon 5D MKIII from Best Buy on March 13, 2013. I am a member of CPS (Canon Professional Services) so waived the Best Buy extended warranty. Within 6 months, I began having a problem with getting random images that were hot neon green or pink. The first one was a wedding in Sept. 2013, a green one. I kind of shrugged it off as a weird freakish occurrence. It was only one image & not a crucial one. Then, it happened again, with a few neon pink images, so I called CPS & they told me to send it in, which I did. They "repaired" it on Dec. 12, 2013. The part description on the invoice showed "PCB ASS'Y Main" which i was told was the circuit board. In January it happened again (pink images). I called & was told to send the camera in again, which I did. This time the repair invoice showed "CMOS SENSOR ASS'Y W/O FB DATA", repair done on Feb. 7,2014. In the first week of March it happened again. I called CPS again, & explained how frustrating this was & how my confidence in this camera was completely undermined & I was about to start the busiest wedding season I've had yet as a photographer & I wanted to have the camera replaced. I was told this wasn't possible without the camera being sent back in & being examined & tested again. So I did, using the 3 day turnaround for Gold members. They did send me a loaner since I had a session during that time. When I hadn't heard anything for almost a week, I called & the Canon rep I'd been talking with checked on it & told me the camera was still with the 'engineers'. She was very polite & eager to help, said she didn't know what the hold up was, but that I could keep the loaner till we got word from the engineers on my camera (the loaner, btw, was fanTAStic! No issues & it just performed overall light years better than mine ever had, what the difference is I don't know). So finally the rep calls me back & says they are replacing the PCB Assembly. I asked if that wasn't what they replaced the first time & she said it was "related" but not exactly the same thing. I reiterated how leery I was with my camera now & it's repeated problem, especially since the engineers weren't able to replicate it so really couldn't say exactly what the casue was, & asked her if I had any avenue to pursue getting the camera replaced since the problems began well before the one year warranty arrived. She said no, but she would extend my warranty for 6 more months & if the problem happened again, she wanted me to call her directly & she wold have more ammunition to go to someone & say it needed to be replaced. So what choice did I have? I've had the camera back about one week, shot one wedding & one bridal. No neon images, but three times it's kind of frozen while I was shooting & there was a "Busy..." message on the display. It's never done that with me. I am just so disappointed in Canon's refusal to make this right. I mean, I paid over $3000 for this camera & they've had it THREE TIMES & still aren't sure what the problem is/was & now it's doing this other weird thing?? (I did email the rep to tell her about this, haven't heard anything back). What would you do in this situation?

