Troubleshooting –Check of ways that my device whether out of order

Software verification
1. Have you updated your windows operation system recently? If so, what's your operating system?
2. What's the operation application you are using? RECentral or OBS?
3. Have you tried to update the new driver?
3-1) OBS: https://drive.google.com/open?id=1BV4b_3GtoS147bM3VZ3FUs69ArIj7No_
 
3-2) RECentral
Win10
http://storage.avermedia.com/web_release_www/CV710/CV710_Win10Logo_Drv_x64_V3.0.64.118_Install.zip
Win7 & Win8
http://storage.avermedia.com/web_release_www/CV710/CV710_1.0.x.87.zip
 
Hardware verification
1. Please using another computer check if it happens the same problem? If so, maybe the device cable went out of order.
2. Here is the Retail/online Store website for global to your reference, you could call them whether can sell the cable. 
(We strongly recommend original cable to use your device.)
https://www.avermedia.com/us/support/stockist