The most problem I ever had was always with the 3 or 4 digit Canon dslr bodies.
In this case the 1000d was giving after a certain number of pictures err99. After this taking photos was possible only after battery out / battery in.
The official service told to the owner, that the shutter should be changed. It’s 75% of the bodies actual value.
I tried to find out, what is with the shutter. In fact, apparently – nothing. Turning (cocking) it by hand, it was going a little bit sticky – so I tried to lubricate it on the cams and on some of the gears with PTFE (teflon) silicone grease.
After assembling, it was working very unusual.
It was possible to make as many shots as I wanted – till turning off and on the switch. After this only one more shot – with err99.
If the body has gone to standby alone (without switch), after waking with the exposure button, and taking a picture – err99.
After some experimenting I’ve found out, that to bring back from this err99 blocked modus, it is possible even only by opening the battery lid, and even by opening the SD-card lid.
This is very strange – I’ve never seen a body coming back from err99 without taking out the battery.
In fact I tried to “repair”the shutter – I supposed that the curtains have to slow speed.
Did You know, that the curtain speed is adjustable? The curtain is moved by a tensioned spring. The tensioning torque can be adjusted by rotating a small plastic pinion, on which is the spring. You can make the speed very low (100% bad exposure) and very fast (100% will break something in the shutter). The best way to destroy your shutter
This kind of repair was not successful.
But now the guy can use the camera, he has just to “switch on” the body by the SD card lid.
I can’t say this is a repair – but it’s a way to make a camera to work.
The whole 1000d is from the inside a beautiful example for the teamworking of engineers and economist. If think, there is nothing more to make cheaper and more simple in a camera.
I am waiting for the 10000d or 30000d series. They will probably have a shutter made of 2 plastic sheets with 2 holes on them, tensioned with a rubber ribbon, cocked with a manual lever like in the 60’s. But minimum 25 Mpixel – just to make happy the customers.