I understand that you are seeing a flashing blue light on your Roku Express 4k+, is that correct?
How are you powering the device? Is it plugged into the TV USB port, or is it plugged into the wall outlet with the provided cables? In addition, have you tried using another HDMI port on your TV as well as trying your device on another TV to see if you are seeing the flashing blue light?
For future reference, You can also visit our FAQs for Roku Express 4K+: Getting to know your Roku® Express 4K or Express 4K+ | Official Roku Support
Keep us posted and we'll continue assisting from there if needed.
Re: Should my ROKU Express4K + have a constant flashing blue light??
Yes I am using the USB port to power the device, I was just wondering if the flashing light was common as the device is working fine. Strange thing is yesterday the blue light was solid but today its flashing again LOL
Are you able to connect to your wireless network fine? If you connect your Roku device to a wall outlet, do you still see the issue occur? Does the flashing light affect your ability to stream content on your streaming stick?
With more detailed information, we will be able to assist you further.