This problem is likely to be a lost connection. The connection between the MK700 keyboard and the USB receiver can be lost due to several reasons:
- Low batteries
- Moving the USB receiver from one USB port to another
- Moving the USB receiver to another computer
- Plugging the USB receiver into a USB hub or other unsupported device such as a KVM switch (your USB receiver must be plugged directly into your computer)
- Radio frequency (RF) interference of more powerful wireless devices such as:
- Wireless speakers
- Computer power supplies
- Monitors
- Cellular telephones
- Garage door openers
Eliminate any problem sources mentioned above that might be affecting your devices.
Before connecting your MX700 keyboard:
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Make sure you have fresh batteries in your keyboard. For battery installation instructions, please see Knowledge Base article 360023223714.
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Make sure the keyboard is turned on. Turn the keyboard over. If the power switch is pushed to the OFF position, move it to the ON position.
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Make sure the USB receiver is directly and securely plugged into a working USB port on your computer.
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Turn your computer on.
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Follow the below procedure to re-connect your keyboard.
Re-connecting your MK700 keyboard:
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Go to Start > Run.
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Type in C:\Program Files\Logitech\SetPoint\connect.exe.
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You will see the Connect Utility screen as shown below:
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Follow the on-screen instructions.
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You will see the following window:
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Click Done if your keyboard is working, otherwise, click Retry.
Additional Information:
If the above solutions do not resolve your problem, consult Knowledge Base article 13855 for instructions on contacting Logitech Technical Support.