Fix it Phil

Oui! should be pretty close to this! Vivitar DVR 781HD Battery Replacement

If they have no head you can try to shove a hard flathead to make a grove and screw them out, you can try with tweezers or worst case scenario, drill them out. To remove stripped screws: If you can get at the screw heads try to grab a long-nose pliers and squash the screw head, then you can try to use a flathead screwdriver or by turning the pliers, if that you don’t have those tools you can try with the normal screwdriver and a rubberband in between. Japanese cameras use JIS/JCIS (Japanese Camera Industrial Screws) screws not philips.

Check if you don’t have any bent pins inside the camera.

Yes, you need to push the little tabs on the sides up if when you put a flash or accessory on it’s lose.

USB ports are directly connected to the motherboard, in any canon service workshop they will the replace the whole board and it will be expensive, I suggest you take it to an independent repair shop that fix laptops and such, they will be able to put it back in place, when customers come with broken USB ports to our shop I give the following options: (1) Replace motherboard (expensive). (2) Use an eternal card reader. If they are not using the USB port for doing tether work and such it is the most sensible choice.

It is not recognizing the position of the mode dial, maybe something is loose inside. Has it gotten wet?

This is due to a limitation of the .mov file, which the Q8 and Q4 use to record. The maximum size a .mov file can be is 4GB. Once this limit is reached while recording with the Zoom camcorder, it will begin a new file to continue further recording , if this does not happen check in the settings to see if you can continue recording after it has reached the 4gb file size.

it depends on how the camera is sited in the, by the shape of it i think it would be quite a difficult task, Samsung Galaxy S8 Plus Rear Camera Bezel Replacement

Hei, probably something broke or got loose inside, if you think you can open it to take a look give it a go, else take it to service.

I would start by cleaning the contacts with whatever alcohol you can find. Update (10/04/2020): Try: - Update camera firmware - Reset all settings (maybe some setting is making your flash not work) If that doesn't help you will have to open your camera to take a look at the connections/wires, for what I see in the picture it has a lot of moisture/dirt that may have creeped inside. https://youtu.be/hpnWB3Yzcac Here is a disassembly guide