Radio Shack Maximus Keyboard - Manual (Page 7)

Troubleshooting
Important! If any of the displays is defective or inadequately installed, you
will not be able to turn on the keyboard.
If the following recommendations do not help you to solve the trouble
you are experiencing contact the producer at [email protected].
You will be offered qualified assistance.
The keyboard is USB connected, but doesn’t work
Check if you have plugged in the power cord. If it is plugged in, make sure
it is plugged in tightly.
The keyboard doesn’t work after the keys were replaced
If any of the key displays is defective or inadequately installed, you will not
be able to turn on the keyboard. Try taking out the newly installed keys one
by one in reverse order. Perform this with the keyboard turned off, you do not
need to unplug the USB cable. Upon taking each key out turn on the keyboard
to check if it works. If you were able to turn it on, it is likely that the key you
took out last was either defective or inadequately installed.
The images have become faded. I can see outlines of the previous
images on light backgrounds
If the keyboard or a single display were in operation with average brightness
level for 20,000 hours they might need replacing. They are still reliable, but
the brightness is permanently lost.
I have trouble with one-and-a-half/double keys/space bar
If you have removed them before that, it is likely that they are inadequately
installed. Consult the instruction at optimus.artlebedev.com. Pay attention
to explanations concerning the keys in question.
There is noise when I press one-and-a-half/double keys/space bar
When installing these keys make sure to have enough grease on the pin. Read
the instruction at optimus.artlebedev.com and follow the recommendations.