The problem is most likely due to a lost connection between your keyboard and your USB receiver. The connection can be lost due to a number of 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)
- Using your wireless keyboard on metal surfaces
- 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 keyboard.
Before Connecting your K320:
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Put fresh batteries in your K320. For battery replacement instructions, see Knowledge Base article 15840.
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Make sure your keyboard is turned on. For instructions on turning your K320 on and off, see Knowledge Base article 15847.
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Verify that the USB receiver is firmly and directly plugged into a working USB port on your computer.
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Turn on your computer.
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Follow the process below to re-connect your keyboard.
Re-connecting your K320:
NOTE: Your K320 keyboard may display as B550 in the Unifying software. This is normal behavior.
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Download the current version of your K320 keyboard software from the K320 Downloads Page.
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Launch the Logitech Unifying Software (Start > Programs > Logitech > Unifying > Logitech Unifying Software).
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The Unifying software Welcome screen will appear as shown below. Click Next to continue:
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Follow the on-screen instructions to turn your K320 off then on:
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When your K320 is detected you will see a confirmation message as shown below. Type a test message into the provided field to verify that the keyboard is working.
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Once you have confirmed the keyboard is working, check Yes then click Next to continue.
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Click Finish to exit the Unifying software. Your K320 keyboard should now be connected.
Additional Information:
If the above solutions do not resolve your problem, consult Knowledge Base article 15800 for instructions on contacting Logitech Technical Support.
Frequently Asked Questions
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