Canon eos R5 mark ii will not power on

[deadlyart]

Looking for some help here. Today i turn on my camera it started up to day. I turn the camera off and add a 1,4 tele. and turn my camera back on only to noticed there is no power what so ever. I am running a battery pack and had 2 fully charged batteries in there. I removed the battery pack and try new solo battery fully charged with door installed again an no power to the camera. I have removed the SD cards and try that. I have add a new SD card.  There is no power going to camera what so ever. I know the camera battery are charged and are the correct LP-EP9. I have cleaned the batteries and the terminal. Not sure what going on here has any one else had the same problems?

Camera set up of time of issue:  Canon eos R5 mark ii / Canon BG-R20/ 2X LP-E6P/ Canon RF to EF converter / Sigma 60-600MM sport/ Adding sigma 1.4 tele./  Updates: version 1.0.1/ scan disk cf express 512gb/ scan disk 256gb sd

[shadowsports]

Greetings ,

Please strip down the camera.  Remove all attached accessories, lenses, adapters, memory card(a) etc.  Remove the battery grip and put a fully charged battery into the camera. Be absolutely sure you have reinstalled the battery door correctly.  If the battery door is not installed properly or the memory card door is not closed properly, the camera will not power on.  Once confirmed, power on.  What are the results?

[deadlyart]

I have stripped the camera down to just the camera it's self. The door has been installed correctly. Installed a new full charge battery and still having no power to the camera. All doors are closed so door and battery door.