Canon EOS 400D / Rebel XTi Digital Camera with 18-55mm Lens Logo

Question about Canon EOS 400D / Rebel XTi Digital Camera with 18-55mm Lens

5 Answers

Xti wont power up

Got a screen said to change battery pack, turned camera off, changed pack, no power up. thought 2nd battery was dead, charged original and place in camera still no power with eithier charged battery

Posted by rbuck on

  • 16 more comments 
  • zbug Dec 12, 2007

    Exactly the same problem here. Changed battery pack for the cam using the battery grip extension and camera just doesn't turn on. Tried old pack (still had power) and nothing. Recharged a single battery and tried without the batt. grip - nothing. Weird - taking it to the store tomorrow.

    will post followup if I figure anything out.

  • jonarissa Jan 03, 2008

    charged battery still did not work. New battery will not turn on. Future Shop retail Vendor no help. Canon wants to have 15 to twenty working days to repair equivilent to one month from 12 month guaratntee. not acceptable

  • Anonymous Jan 06, 2008

    exactly as above 3 users. except this is the second time it has happened to me.

    Had the camera repaired ! time round paid R 2000 or so, 6 months later was in the middle of a photo when the power just went, thought the battery was flat, charged the battery- Nothing. Camera is absolutely dead again! its unacceptable that Im going to have to repair it again and pay that much money. Unfortunately bought my camera in Hong Kong and international warranty does not cover me in my country. Very upset!!!

  • imf979 Feb 08, 2008

    Was in the middle of a shoot when the battery ran out, charged the battery the whole night through, tried it again this morning and the camera still won't turn on.  Is the problem with the battery or with the camera?  I live in Nicaragua at the moment and am not fully aware, what kind of assistance can be offered to me here.

    My camera is only slightly over a year old and I find it unaccetable to be running into these types of problems already.

  • FlickerFlynn Feb 29, 2008

    Same problem here. Almost 1 yr old. Has taken great pics. Simply said battery low. Charged battery-nothing. Bought and charged new battery-nothing. What is the problem? Somebody said they had it repaired, what did they repair?

  • Anonymous Mar 02, 2008

    Mine did a similar thing - in the middle of taking pictures it just turned off. It appears to be the main board - have tried all other suggestions. Have had the camera 14 months and am very DISAPPOINTED! Called Canon and was disappointed in their non-responsive person answering the phone.

  • Anonymous Mar 25, 2008

    I just encountered the same issue with my Rebel XTi, which is just 10 months old. The battery pack was fully charged when I first noticed this issue last week. It did not show me Low Battery indicator though. First, I thought it is a battery issue, so I changed the battery with another genuine Canon battery pack, but it did not work either. Left the camera as it is and next day it was working fine. Took 3~4 pictures and it went dead again and never come back to life.

    I did measurements on the both the batteries and found that as soon as I put the fully charged batteries (approx 8.3V), the camera drains the charge and voltage on the battery drops to 5.3 volts almost instantly. Something is definitely wrong inside.

    Luckily, my camera is till under warranty but I am very concerned. This would be 4th time I am sending my camera to service center. Called the tech support yesterday and he said that he never heard of this issue before. I will be sending the camera to the service center today. I will come back and update this thread. But surely, as a user, we can't do anything to fix it except sending it to the service center.

  • Anonymous Apr 15, 2008

    I had sent my camera to Service center and they found that the main board had gone bad. It was replaced under warranty. It took them 2 weeks to understand and fix the issue. But they are not willing to share their findings with me as I had called them multiple times to understand what is causing it.

    Last Friday, they sent the camera back to me. But I am refusing to accept this unit. Reason - This particular camera unit had been sent to Service center 4 times for various reasons. I will only settle for a new unit with extended warranty.

    It was a challenge to put the point across to the customer support guys. Though, many of them sympathize but the lower rung of representatives say that they cannot do anything. Their supervisor are very uncooperative. Now my case has been forwarded to Customer relations. Will post back what happens next.

  • Anonymous May 02, 2008

    Early last week, finally a Canon Rep from Customer Relations called me and offered me to replace my dead unit (which they have already repaired with a new main board) with a refurbished unit. I refused and insisted on the new camera unit only. After a refusal for couple of times, they finally accepted and sent me a new camera.

    I sincerely hope that it works as a Canon Camera is supposed to.

  • jannoetland Jun 09, 2008

    I have the same problem. I bought this camera 13 month ago. After charging the battery, the camara wonn't power up. What to do?

  • Anonymous Oct 22, 2008

    I guess I'm the 13th person with the same exact problem on my Rebel XTI....and that sounds unlucky, except I have a four year warranty with Best buy so I'm taking it tomorrow to get it fixed.....I love my Rebel XTI and have had no problems with it since my purchase in Dec 2006.....Maybe Canon needs to look at this same problem and consider a notice to consumers and a possible recall on the main board....good luck you other 12

  • Anonymous Nov 01, 2008

    batteries are fully charges and the card is in.  the camera will not power on.

  • Anonymous Dec 22, 2008

    I bought my XTi in May for a trip to Europe. 2 days into the trip it died. called canon CS, they emailed me a postage label. a couple days later, it started to work again, so I figured there was no reason to return. It worked okay through the summer, although it would not turn on every once and a while. Now it does it all the time. I did the same as other posters, figuring it was the battery - ends up it was not. Emailed Canon CS, this time they say I have to mail it to them ON MY DIME! Sorry, but so far I have paid about $1000 for the body and lenses, I am not paying a dime to ship this lemon to them. I am going to call them tomorrow to see what they say. I am super angry because now I don't have a camera to take pics of my children with on Christmas Day :(

  • Anonymous Dec 27, 2008

    I have the same problem also.

  • Anonymous Feb 20, 2009

    my camera stopped working. took some pictures. put it down, went to use it agian and nothing. it wont turn on. tried multiple batteries at full charge. please advise

  • debcountry4 Mar 25, 2009

    charged battery to be certain it was ready for weekend trip and will not power up. Thought perhaps it did not charge properly, charged again, no luck. Had for 15 months, warranty expired, ouch.

  • MaxMaxwell May 05, 2009

    I have a Canon EOS 400D which I have owned for about two years. Yesterday I had finished shooting a large number of pictures, and the battery was indicating low. I turned the camera off and some 1 hour later found the camera was dead and would not power up at all. I replaced battery with a charged one, and you guessed it... Nothing happened!

    I have tried a re-boot by removing and replacing the battery and the internal battery, but still no life.

    No idea about fixing this except if it is a thermocouple problem (to protect the LCD against use when very cold?), I guess a bit of thermal cycling could help if the sensor is "stuck" in some way. Tempted to put camera body in a sealed bag in the freezer for a bit and see what happens! (This really does work on some faulty hard drives - but is not for the faint hearted). Any ideas?

  • Anonymous Dec 07, 2012

    Will never buy from BestBuy...My canon EOS is having the same problem...won't come on after trying new battery. What gives...


5 Answers


  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert whose answer got voted for 20 times.

  • Expert
  • 148 Answers

Appears to be a defect and not user serviceable.
sorry for the news.
good luck.

Posted on Dec 24, 2007


  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

Check your battery charger . May be reading a fully charged battery and shutting off . Fixed my problem

Posted on Oct 18, 2011


Sue both retailer and Canon. Small claims Court no excuse for an expensive piece of equipment not to work

GMS Montreal Canada

Posted on Oct 22, 2008


  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

This is not good news!!! I am having the same problem with my 2 year old Canon rebel XT. One day it just stopped turning on... and now the battery is discontinued (you can buy new ones, which cost roughly a 100$) but the camera shop said they will not guarantee this to fix. I am NOT HAPPY!!! Canon is going to get a HUGE earful when I call on Monday. Is there really nothing we can do?

Posted on Jan 23, 2010


  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Well, I'm the 12th user. Just wanted to post that my camera had the same issue at 13 months old. I'm about to take it in for service under warranty. Hope I don't run in to problems getting it taken care of! This site was very helpful in helping me determine the issue.

Posted on Oct 20, 2008

Add Your Answer


Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:


I have a Canon Rebel XTI and it was working fine until one day it just decided not to turn back on. Tried charging both batteries multiple times and upon putting them in, it still will not turn on. Am I...

Sorry to hear about this. I have a similar camera and have been racking my brain about this...

My only thought...are you using the same battery charger? Perhaps the battery charger is to blame. You may be out of battery on both batteries. When you install the battery, does ANYTHING happen? Does it say, LOW Battery or CHANGE the battery? Or is it totally black? If nothing happens at all, you should probably contact Canon directly. Or purchase a new charger and see if that fixes the problem.

Canon Customer Support Center Phone: 1-800-OK-CANON
1-800-652-2666 Hope this helps!

My Canon xti stopped working at my son's graduation. I had a full battery and took a few photos.....then turned it off.....and when I turned it back on again, it was completely dead. Tried several...

Hiyou might have a problem of either main pcb or power control pcd (dc/dc convertor). it is common but it cost. It cause usually come from loosen screw going around inside and short. If it is lucky, then your unit would just a fuse brown. If not, it has to change main pcb and all of computer adjustment is involved. Your local repair shop would charge you around $65 to 235.

Canon EOS rebel XTi won't turn on. Changed batteries several times still nothing

Trying taking a Q-tip with some alcohol and cleaning the contacts inside the battery chamber. Also, you can take it to your local camera store and ask them to try it with one of their batteries to rule out if yours is dead.

Thank you.

DCR-TRV30 Internal clock battery is end of life. It will not charge overnight or hold date/time set information between main battery changes. There is no replacement information in the user manual. Where...

This small back-up battery on my Sony is under the main big power battery, it is like a large screw under the main power pack, I just turn that screw and the little round lid comes off to get to the little silver flat back-up one.
They are readily available from most good camera shops like Jesops for around £12 to £15 each.


Canon EOS 400D will not power up replaced both batteries still no go although when a new main battery is inserted and the camera is turned on the green indicator lights and will not turn off until the...

Generally a fuse blows on these, on the DC/DC converter (psu ) board. This is situated on the front of the camera, fairly easy to get at just involves undoing loads of screws!! The fuse is marked "K", replace or short out with a thin piece of wire. May be caused by changing lenses with the power on, but not sure.
Watch for the charged flash capacitor though!!
Had this problem with mine.

Camera wont turn on.

try replacing the battery. Check best buy, radioshack or other camera dealers for a battery. Possible deadcell battery. These lith-ion batteries die with no warning. If there is no change, the camera is defective!! hopefully htis helps

I have a Canon SLR 400D and the LCD screen won't view anithing unless i press teh display button and the display details comes up. if anione got a solution for this problem can u pleaze write as soon as...


Screen blanking is often a part of the power saving profile. Have you tried changing this in the Tools menus? You should be able to alter the screen blanking time out to a longer period or a disabled setting. I suspect yours is very brief.

The battery packs for the Canon EOS line are very very good and can handle the screen always being on until you close it and use the view finder instead.

Let me know if this is on target or not as the only other reason would be a faulty battery pack. These packs have chips in them that send the battery strength signal back to the camera. And if the camera thinks the battery is critical low, it will default to turning off the screen right away.

Give me a hint if this makes sense in your case or not. I can check if its a known problem of your model.. So, on your camera label there shold be a version number for your 400D, that would be helpful too.


Fuji F10 No power

You said that you changed the battery, did you put it in the right way around?.

I had exactly the same trouble, changed the battery (got it on ebay for £2.99) charged it and it worked.

Having said that, I closed the lense from external power. If the camera wont operate from external power then the camera is probably dead.

Power on Problem

please make sure the batteries you are using are genuine.
Not finding what you are looking for?


Ask a Question

Usually answered in minutes!

Top Canon Cameras Experts

old marine
old marine

Level 3 Expert

2418 Answers

David Shaub

Level 3 Expert

2994 Answers


Level 3 Expert

490 Answers

Are you a Canon Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides