Always consult the official Owners Manuals first!
Troubleshooting tips
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Contents
The three most important troubleshooting tips
- Check your cables.
- Check your cables.
- Check your cables.
Solving boot issues
Things to check when there's no sound
If the unit or a preset doesn't produce any sound, check the following:
- CHECK YOUR CABLES!
- Device has the latest firmware installed?
- Input is connected to Output on the grid through blocks or shunts?
- Bypass Mode in bypassed blocks is not set to “Mute”?
- The physical output corresponds with the Output block on the grid?
- Blocks are set to the correct X/Y state or channel?
- The Cab block is not set to an empty user cab slot?
- Volume block with an attached controller is not set to zero volume?
- Output level knobs on hardware are turned up?
- FX8 has the correct "pre/post" preset config?
- Noise Gate (in Input block or separate block) doesn't have its Threshold set too high?
- Scene output level in Output block is turned up?
- Digital audio: USB Level or AES / SPDIF is turned up in I/O?
- Front input is set to correct setting (front / rear)?
Handy meters on the Axe-Fx III and FM3
The Axe-Fx III, FM9, and FM3 make it easy to see if (and where) the signal flow is interrupted:
- Go to Layout > Meters to see meters for all blocks in the preset.
- Check the Input and Output meters on the front/top panel to verify that there’s an input and output signal.
- Check the blocks to detect any issues.
Set AC Line Frequency to the correct setting for your country
If you are using the Axe-Fx III, FM9, or FM3 in a region where AC power frequency is 50Hz instead of 60Hz, change the AC Line Frequency setting in SETUP: Global Settings: Config.
Test tone
If you want to make sure that the hardware is capable of generating sound, create a simple test tone:
- Add a Synth block and connect it to the grid output.
- Select the Sine wave and turn off Tracking.
Harsh sound
If the sound is harsh, without low end, check that the preset hasn't got an engaged Wah block.