The keyboard shows a connection but nothing happens on screen.

Could be a battery problem. Some devices have a reset. Try the support link on the following page: Rii - Mini Keyboard,Wireless Keyboard,Bluetooth Keyboard,Remote control,Mouse (riitek.com)

I can't find the manual for this model. The only user manual I turn up is for a combo unit: https://minitoetsenbord.nl/wp-content/uploads/2016/11/Rii-Mini-X1-toetsenbord-RII-MWK01-handleiding.pdf

Question edited for clarity.

It needs charging!

Why is the yellow light flashing on my rii keyboard?
A: the yellow light flashes when it needs to be charged or when the receiver is not plugged in to the usb on computer. Try charging it and fully plugging in the little receiver.

the yellow light is blinking and the keyboard does not work?

https://www.amazon.com > ask > questions Search for: Why is the yellow light flashing on my rii keyboard?

???? ????? ????? mabco.co

change battery of charge unit ---battery failing or weak

https://www.youtube.com/watch?v=ILXuNkqo-hU

usb dongle see video on dongle
hopefully plugs into the usb port of the TV and interfaces with the dongle. not bluetooth !

The thw wireless mouse is paired from fabric wirh USB dongle for same mouse. You can't connect a wireless keyboard to it because they are no different frequency. Actually it's hightly improbable that you even could connect the USB dongle of a mouse with another different mouse. Explanations is logical: presumeyou are in a big office whate another 1 users have wireless keyboards or "mice". Now, imaginge the mess if the dongle of your keyboard should control the mouse of another 9 usrs.
Now, it's competely different with bloetooth keyboards and"mice"
USB Dongle for Microsoft Wireless Keyboard and Mouse 5000

Hi
I found some instructions for you in the form of a Word Document which can be obtained from here:
Rii mini i8 keyboard RT MWK08 2 4G touchpad
This looks like a purchasing site - it is - but just under the "Order" there is a link to the English manual which will download automatically when you click on the link.
Hope this is helpful, if so would you please register that with Fixya
Cheers

hello, where can I download river for MWK020 keyboard
Thank you

You just plug the usb adapter for the wireless keyboard and mouse into the computer and run the install disk. Wireless just means that the device sends signals to the recieving devices.

turn onthe computerand press f10 the run vaio backup
utiity