EOS-1d Mk3 Mirror stays up error

[SaxonTony]

I am sure this must have been discussed before.

I have had my Mk3 from new around 2009 and it has not had much use and is still in mint unmarked condition.

However after about 3 shots the mirror stays up and i have to switch it off for it to go back down and then switch on again to use, until it stays up again.

I have used it like this for years but no I want to fix it so does anyone know what I need to do to correct it!

its 559799

[jrhoffman75]

Canon Support | Service Notice: EOS-1D Mark III/EOS-1Ds Mark III: Abnormal Mirror Operation (Err 99)...

The 1D Mark III has reached the end of the Canon repair period, so I don't know if you will be able to get this resolved.

Products that have reached the end of the repair period | (canon.jp)

[ebiggs1]

"... I don't know if you will be able to get this resolved."

At Canon he means. There are other repair shops that can service it. But first you have done a complete reset? Complete???  There is a date/time battery (CR2025) which maintains the camera's date and time and settings. Its service life is about 5 years so replace it. Also a new main battery Canon brand if possible.

If it still misbehaves then it truly needs service. The problem is parts not finding a repair shop. Parts will be difficult.

Try Camera Repair Center Inc.

[ebiggs1]

Again I can't stress enough the complete reset and new batteries. That's why I am posting this again. You have to do this first. When you replace the button battery take your time doing it. Even let the camera sit for a few minutes to completely drain it.

[SaxonTony]

Im embarrased to say that I dont know where the button battery is? can you kindly tell me?

[SaxonTony]

and its Err 99!

[SaxonTony]

found it - the cr2025 is out now for the first time since it went in at the factory!

[normadel]

Do you have the manual for the camera?  Page 188 shows where the clock battery is. 

If you don't, download it from https://www.usa.canon.com/support/p/eos-1d-mark-iii

You can also find on eBay  printed manuals, both the factory-supplied book and printed 7 bound 8.5x11 copies.

[SaxonTony]

I found it and replaced it with a new duracell 2025, I waited an hour between taking the original battery out and putting the new one in.

I did manage 30 photos before error the first time and then only 3 photos on the second attempt - so no improvement.

I have ordered a new main battery to see if that helps.

[SaxonTony]

Update - changing the CR2025 did nothing - so the 15 year old cr20205 was still ok!  

When my main battery is charged up 3 green lights on the charger and I press calibrate - it drops to 2 green lights!  so maybe my main battery is the problem ( i have ordered a new main battery already)  just waiting for delivery.