Peripherals

Wireless combo: mouse works but keyboard doesn't (or vice versa)

When one half of a combo set stops working while the other is fine, it's almost always that one device, not the shared receiver, since a shared receiver usually fails both at once.

Difficulty
Easy
Time
10–20 minutes
DIY cost
$0–$15

Symptoms

  • Mouse moves fine but keyboard doesn't type
  • Keyboard types fine but mouse won't move
  • Problem only affects one device consistently
  • Issue started after changing batteries in one device

Likely causes

  • CommonDead or low battery in the non-working deviceCombo sets often use separate batteries per device, so only one can run low while the other is fine.
  • CommonDevice unpaired from the shared receiverA shock, battery change, or accidental button press can unpair one device from the receiver.
  • PossibleInterference specific to one device's frequency channelEven with a shared receiver, each device can have separate connection health.
  • CommonPhysical switch on the device turned offMany wireless keyboards and mice have a separate power switch that can be bumped off.
  • Less commonOne device has failedElectronics in one unit can fail independently of the other.

What to do

  1. Check the power switch on the non-working device to confirm it's turned on.
  2. Replace the batteries in the non-working device even if they seem to have charge left.
  3. Check the manufacturer's manual for a re-pair or reconnect button specific to that device and the receiver.
  4. Unplug the USB receiver, wait 10 seconds, and plug it back in.
  5. Move the receiver closer to the affected device using a USB extension cable if needed.
  6. Test the non-working device on another computer with a compatible receiver, if available, to confirm it's the device and not the computer.
  7. If nothing restores the connection, contact the manufacturer, since many combo sets can have a single unit replaced under warranty.

Tools and parts

  • None
Replacement batteriesSearch: “AA batteries wireless keyboard mouse”

When to call a pro

If one device in the combo never reconnects despite fresh batteries and a repair attempt, that individual unit has likely failed and can usually be replaced without buying a whole new set.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.