Canon EOS 40D Repair Forum

Learn How It Works Ask a Question

All Questions

Canon EOS 40D questions

clear

5 Answers

My 40D suddenly will not turn on

accepted Canon EOS 40D 5 Answers

Black Circle 103

Commented

Apr 21, 2025

commented Apr 21, 2025 by Black Circle

2 Answers

Canon40D won't fire up

Canon EOS 40D 2 Answers

Commented

Dec 22, 2024

commented Dec 22, 2024 by Zephosk

1 Answer

What is wrong with auto focus

accepted Canon EOS 40D 1 Answer

Robin Taylor 2k

Commented

Jul 10, 2024

commented Jul 10, 2024 by Robin Taylor

1 Answer

My camera does not turn on

Canon EOS 40D 1 Answer

DanJ 495.8k

Answered

Jun 21, 2024

answered Jun 21, 2024 by DanJ

1 Answer

Camera not formatting CF cards

Canon EOS 40D 1 Answer

bill 6.4k

Answered

Jun 10, 2024

answered Jun 10, 2024 by bill

1 Answer

Rubber door for DC power adapter cable

Canon EOS 40D 1 Answer

Nick 98.3k

Answer edited

Nov 4, 2023

answer edited Nov 4, 2023 by Nick

0 Answers

My rear display is blank otherwise it works ok? can anyone advise me?

unanswered Canon EOS 40D 0 Answers

Asked

Jan 21, 2021

asked Jan 21, 2021 by bryanrmn

3 Answers

Why does my camera turn off by itself?

accepted Canon EOS 40D 3 Answers

Commented

Aug 31, 2020

commented Aug 31, 2020 by fmax32

1 Answer

Error 001 on display. Contacts between lens are clean!

Canon EOS 40D 1 Answer

Answered

Aug 20, 2020

answered Aug 20, 2020 by Jean Ockert

2 Answers

Why does my Canon EOS 40D camera display error-99?

accepted Canon EOS 40D 2 Answers

Answered

Apr 2, 2019

answered Apr 2, 2019 by smith jones

1 Answer

Some pictures from camera

Canon EOS 40D 1 Answer

Answered

May 27, 2018

answered May 27, 2018 by Declan Marsh

0 Answers

way I can't format the cf card

unanswered Canon EOS 40D 0 Answers

Asked

Dec 18, 2017

asked Dec 18, 2017 by Jose L Nava

1 Answer

My camera won't fire.

Canon EOS 40D 1 Answer

Answered

Jun 11, 2016

answered Jun 11, 2016 by ThomasK

1 Answer

Why will my flash not fire?

accepted Canon EOS 40D 1 Answer

Accepted an answer

Oct 1, 2015

answer accepted Oct 1, 2015 by Doug Kruse

1 Answer

Why is my camera's response time slow?

accepted Canon EOS 40D 1 Answer

Commented

Jun 6, 2015

commented Jun 6, 2015 by james robson