I bought this keyboard: * CE05825 to go with the Raspberry Pi. With the dongle in one of the USB ports the mouse is working but not the keyboard. Tried it with my iMac and also wit a Windows 10 machine. Same results: the mouse works OK -albeit it bit “shaky” but the keyboard is absent… In the - very poor English - manual it says to “power on the keyboard, the code indicator light turn on”. But… I cannot discover a power switch on the keyboard and I do not see a code indicator light on or off… Please help!
Fortunately I have an older Logitech keyboard/mouse combo with dongle and that works OK with the Pi. (So it is not the Pi…)