Mechanical Keyboard Troubleshooting
For M4G mechanical keyboards. This guide covers the most common issues and the fastest fixes. Follow the steps in order to avoid wasting time.
A key works sometimes, sometimes not
Quick Fix
- Remove the keycap and clean the area (dust/hair).
- If your model is hot-swappable: remove the switch and reinsert it firmly.
- Test again. If the issue continues, replace the switch.
When it’s hardware
Signs of a faulty switch
- The same key keeps failing even after cleaning and reinserting.
- Key registers double clicks or no clicks repeatedly.
Liquid spill on the keyboard
Immediate Steps
- Unplug the keyboard immediately (or turn it off if wireless).
- Do not keep typing “to test it”.
- Dry the surface, then leave it to dry completely before trying again.
Important
What usually happens
- If liquid reached the PCB, the keyboard may be permanently damaged.
- Even if it works at first, corrosion can appear later.
RGB is off / stuck / not changing
Quick Fix
- Check the keyboard manual shortcut for RGB mode/brightness.
- If your model supports software: open M4G Software and apply a different lighting profile.
- Make sure settings are saved/applied (some models require “Apply/Save”).
If RGB still doesn’t work
Next steps
- Try another USB port (avoid hubs).
- Test on another PC to rule out OS conflicts.
Keyboard types by itself (random characters)
Quick Fix
- Disconnect the keyboard and inspect the keys (stuck keycap / debris).
- If hot-swappable: identify the problem key and replace that switch.
- If not hot-swappable: contact support for guidance.
Hardware warning
Common causes
- Faulty switch causing continuous input.
- Liquid damage or PCB issue.
A full row (or column) stopped working
What you can try
- Try another USB port and another cable if possible.
- Test on another PC to rule out software issues.
Most likely cause
Hardware issue
- PCB / matrix line issue (needs inspection).
- If the keyboard is under warranty, contact support.
Wireless stopped working (Bluetooth / 2.4G)
Quick Fix
- Charge the keyboard (low battery can cause unstable wireless).
- Confirm you are in the correct mode (wired / BT / 2.4G).
- Forget the device on your PC/phone and pair again.
Manual relink
Relink steps (generic)
- Enter pairing mode using the model’s shortcut (check manual/software).
- For 2.4G: try another USB port for the dongle and pair again.
- If it still fails, test wireless on another device to confirm.
Keyboard is completely dead (no input)
Quick checks
- Try a different USB cable and a different USB port.
- Avoid USB hubs/adapters. Plug directly into the PC.
- Test on another PC.
If nothing works
Likely hardware
- If the keyboard still doesn’t respond, it likely needs inspection.
- If it’s under warranty, contact support for the next steps.
General known fixes (quick checklist)
Checklist
- Restart your PC and try again.
- Use a direct USB port (no hub).
- Disable conflicting tools (macro/RGB/remappers).
- Try the keyboard on another device.