I just got a Canon 6d Mark II but My Neewer Vision5TTL and vc 818tx will not work at HSS. The Camera even though will fire the flash at All Speeds I get Shutter Drop above 1/160

SOURCE: canon 20D error 99 shutter stuck

i hust send it to repair lest wait...

SOURCE: shooting in low light with a canon rebel xt

Hello parr_alp,
Please keep in mind that when shooting in low light, you will ALWAYS get some amount of blur when you are hand holding the camera unless you use a flash. The only way to increase your shutter speed is to crank up your ISO setting to 800, 1200, 1600, etc. If there is no tripod handy, brace yourself against a stationary object and remember to keep your elbows tucked down near your body when shooting (no sense in holding up your arms, too).
There is no way to increase the ISO limits of your camera while maintaining quality of your images. And once again, you will ALWAYS get a certain amount of blur when hand holding the camera. 
The external flash not firing is an entirely separate issue. This could have to do with your metering, a bad flash, bad connection in the hot shoe, what shooting mode you're in — the possibilities are numerous. The next time your flash doesn't work, write down all the settings of your camera and keep track of them (i.e. shooting mode, metering mode, flash settings, current lighting situations, etc.) You may start to notice a pattern and perhaps we can help you here.
Anyway, happy shooting, and if this response was helpful, please rate it! Thank you!
Jeff

SOURCE: Canon 430EX II flash... batteries A-OK. But flash

Hello

Thank you for using FixYa for your problem

Sounds like the flash tube has gone.
It should be taken to an authorized repair centre for a repair estimate.

Please rate our solutions and if you still have problems please call back for more ideas to help you

Thanks
Richard Scott
Technical Support
New Zealand

SOURCE: Canon EOS 5D Mark II whrer is the selftimer botton

Self timer function is mentioned on page-86 of manual.
Below image is part of user manual that will help you to turn on self timer.
Thanks.

SOURCE: camera wont turn on and shutter stays open even

Go to the autorizated service for solve a problem