What does E.04 mean on EP-40 Riddim?

E.04 indicates "LFS Mount Error". File-system error. The internal file system failed to mount and needs to be formatted. This will erase all your samples and patterns, but factory content will remain. To fix this, Power the device off, then hold [COMMIT] + [SOUND] and turn it on. FMT will display on the screen for about 10 seconds, then it will start up as usual with all user content removed. Factory samples will remain.

What does E.05 mean on EP-40 Riddim?

E.05 indicates "Sample Filesystem Error". File-system error. The flash storage needs to be formatted. This will erase all your samples and patterns, but factory content will remain. To fix this, Power the device off, then hold [COMMIT] + [SOUND] and turn it on. FMT will display on the screen for about 10 seconds, then it will start up as usual with all user content removed. Factory samples will remain.

◆ error codes

EP-40 Riddim error codes

Q: What does E.01 mean on EP-40 Riddim?

E.01 indicates "SRAM Error". This is a hardware error. Your unit needs to be repaired by Teenage Engineering. Contact their support for repair options.

Q: What does E.02 mean on EP-40 Riddim?

E.02 indicates "Flash Error". This is a hardware error. Your unit needs to be repaired by Teenage Engineering. Contact their support for repair options.

Q: What does E.03 mean on EP-40 Riddim?

E.03 indicates "Codec Error". This is a hardware error. Your unit needs to be repaired by Teenage Engineering. Contact their support for repair options.

Troubleshooting guide for every EP-40 Riddim error code: what each one means and how to fix it.

quick reference

Code	Meaning	Type
E.01	SRAM Error	Hardware
E.02	Flash Error	Hardware
E.03	Codec Error	Hardware
E.04	LFS Mount Error	Fixable
E.05	Sample Filesystem Error	Fixable

fixable errors · file system

These errors can be fixed by formatting the flash storage. Warning: This will erase all your samples and patterns, but factory content will remain.

E.04

LFS Mount Error

Fixable

File-system error. The internal file system failed to mount and needs to be formatted. This will erase all your samples and patterns, but factory content will remain.

To fix: Power the device off, then hold [COMMIT] + [SOUND] and turn it on. FMT will display on the screen for about 10 seconds, then it will start up as usual with all user content removed. Factory samples will remain.

E.05

Sample Filesystem Error

Fixable

File-system error. The flash storage needs to be formatted. This will erase all your samples and patterns, but factory content will remain.

◆how to format flash storage

Power off your EP-40 Riddim completely
Hold down [COMMIT] + [SOUND]
While holding, turn on the device
Wait for "FMT" to appear on screen (~10 seconds)
Device will restart with a fresh file system

Tip: After formatting, update to the latest OS version to prevent future issues.

hardware errors · requires repair

These errors indicate a hardware problem that cannot be fixed by the user. Your device will need to be repaired by Teenage Engineering.

E.01

SRAM Error

Hardware

This is a hardware error. Your unit needs to be repaired by Teenage Engineering. Contact their support for repair options.

E.02

Flash Error

Hardware

This is a hardware error. Your unit needs to be repaired by Teenage Engineering. Contact their support for repair options.

E.03

Codec Error

Hardware

This is a hardware error. Your unit needs to be repaired by Teenage Engineering. Contact their support for repair options.

Contact Teenage Engineering Support

If you're seeing a hardware error code, you'll need to contact Teenage Engineering for repair options.

contact support →

prevention

◆prevention

•Keep firmware updated: Install the latest OS updates to fix bugs that may cause file system errors.
•Use quality batteries: Low battery during write operations can corrupt the file system.
•Avoid power interruptions: Don't remove batteries or disconnect power while the device is saving.
•Back up your work: Regularly export your projects to avoid losing work if you need to format.

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