A “Sub System No Response” message indicates that the flash ROM memory that the operating system resides on is malfunctioning. If this message appears on your VS-2400CD’s display, the unit will need to be sent in for service. To get your Roland product serviced, you have two options:
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You can use our Service Center Locator at the link below to contact a Roland authorized service center:
Service Center Locator -
You can send the unit directly to our facility in Los Angeles. To send the product to the Roland Los Angeles facility, you must first obtain a Return Authorization number (RA). You can do so by using our online service request form on our site here:
New Service Request
Additional service rate and warranty information can be found here:
Service & Repair Information