Rebel T7 locks up after taking it to shop to clean the sensor

[maxmodder]

Never had a problem with the screen going blank randomly after taking some pictures, and the camera essentially locks up.  Took the camera in to get the sensor cleaned and when I got it back, the problem started.  Shop claims it was nothing they did on their end.  They tried different lenses, batteries, SD cards, factory reset settings, the issue still persists.  What are the odds that it's just a coincidence?  What could the actual problem be if it's internal?  There's no error codes.

[deebatman316]

How many pictures can you take before the camera locks up. Stick to full size SD cards DO NOT use Micro SD Cards in an adapter. What size SD Card are you using stick with 32GB (SDHC) or smaller cards. Rebel cameras don't play nicely with 64GB (SDXC) or larger cards. They will often cause the camera to lock up even though the camera manual says there compatible THEY ARE NOT COMPATIBLE.

[maxmodder]

It's not the card.  I've been using everything from 32 to 128 full size SD cards just fine for over a year.  It only started locking up AFTER I got it back from the shop.  Literally that same day.  It will lock up in as few as 3 pictures taken.

[deebatman316]

With the camera you use large SD cards 64 GB and larger often cause no problems out of nowhere. Discontinuing the use of those cards fixes the problem. Where was your camera repaired at. Canon or an independent repair facility. If it was Canon they warranty their work. 

[deebatman316]

What size SD Card is currently in the camera if its 64GB (SDXC) or larger. I recommend discontinuing the use of that size SD Card. For some reason these cards will work sometimes then it WILL randomly cause problems. Going back with a 32GB (SDHC) or smaller card will stop the camera from hanging. The manual states that these cards are compatible THEY ARE NOT. Please buy a card from a reputable company. Amazon Marketplace IS NOT reputable. Stick with well known brands such as Lexar, SanDisk and Prograde Digital. Look for a 32 GB Class 10 SD Card. ALWAYS FORMAT cards in camera.

[Waddizzle]

I agree with Demetrius. It is true.  The SDXC SD cards, 64GB or larger, can cause the camera to hang.  Don’t know why, just that they can and do.  Stick to using just the SDHC cards, 32GB or less, for the time being.  Let’s see if the issue returns with the smaller cards.  Make sure to format the cards in the camera prior to first use.

Make sure to use major brands of SD cards.  Only purchase them from a Factory Authorized Canon dealer.  The Amazon marketplace is not a good place to shop for memory cards, batteries, or any electronic camera accessories.

You might try resetting the camera back to factory defaults and make sure Wi-Fi is disabled.

[wq9nsc]

Try a different battery pack (or if the T7 has a battery health display in the menu, look at it).  As a battery ages, it is unable to source sufficient current under load and when that happens voltage will drop and the camera will lock up.  It doesn't matter whether the camera shows full charge on its display, if the battery is aging and develops high internal resistance the voltage will drop dramatically as it is processing and storing the image.

I ran into a similar issue with my 1D Mark II years ago when I had to use a third party battery due to a shortage of Canon packs.  It worked fine for single shots but a short burst would cause the camera to freeze because even though the battery showed a full charge, the voltage dropped significantly under sustained load.

Rodger

[ebiggs1]

" What are the odds that it's just a coincidence? "

If they cleaned the sensor properly it is just a coincidence.  I don't know the capability of the shop you used.

Now first off when you troubleshoot your camera it needs to be at a basic starting point. Reset it to default settings using the menus. Next buy a brand new Canon brand battery. Check your charger that it is charging properly. Buy a brand new top quality SD and do keep it at or below 32 GB for now. Try different lenses (important) if you have only one lens see if you can borrow another lens. Now once you have done all tis and it still doesn't work it needs servicing by Canon.

[maxmodder]

After resetting to factory settings, using two different SDHC cards, 32GB formatted (Sandisk) and different lenses, and different batteries fully charged, the issue is still present.  Looks like it's an internal issue.  What could the internal issue be?

[deebatman316 · Accepted solution]

This sounds like its time to send the camera in for repair at Canon's repair facilities.