D405: USB 3.0 Not Recognized (Connects as 2.1) & Frequent Disconnections

• MartyX Grover

  • June 15, 2026 09:41
  • Edited

  Hi SeungYeon Moon  Although RealSense cameras can work with USB 3.0 ports, they usually detect as 2.1 on those ports because the USB port on the cameras is designed for a minimum of USB 3.1 Gen 1.  If your computer does not have a USB 3,1 port, a workaround that sometimes works is to connect the camera to a USB 3.1 hub device and connect the hub to the computer's 3.0 port.

   

  The frequent disconnections could be caused by the USB port damage though.  If you are able to test with a hub and can achieve a USB 3.2 connection but the frequent disconnections still occur then I would recommend RMA return.

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• SeungYeon Moon

  • June 16, 2026 00:09

  Thank you for the explanation.

  I am currently located in South Korea. I looked into the A/S process and I understand that since RealSense spun off from Intel, the RMA process requires shipping the device to a facility in China.

  Before I initiate the return, could you please clarify a few things?

  1. Estimated Time: Approximately how long does the entire RMA process take from shipping it out to receiving the replacement/repaired unit?

  2. Estimated Cost: Roughly how much will it cost on my end (e.g., shipping fees, and repair costs if the physical damage is not fully covered by the warranty)?

  I would appreciate it if you could provide this information so I can make a decision. Thank you!

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• MartyX Grover

  • June 16, 2026 08:19

  1.  Estimated time is difficult to answer if the RMA was handled by our China team instead of the US team.  I would think that an international shipment from South Korea to China might take several days at the most, and that once the camera was received, if it is agreed to replace it then it should take place within a week.  There would then likely be several more days to international ship a replacement back to you.

   

  2.  If a camera is replaced under warranty then there is usually no charge for the camera but there may be a customs charge when the camera arrives in your country.  It would dependent on the particular country's customs policies whether a fee is levied.  You would be responsible for paying this fee in order for customs to release the camera to you.

   

  RealSense do not charge repair costs under warranty.  RealSense engineers may attempt to fix the original camera if it is a software-fixable problem such as a damaged firmware, but would usually replace the entire camera in cases of a hardware fault.

   

  If the camera is not replaceable under warranty then it is possible to repair USB port damage yourself by opening up the camera, and either soldering internal USB connector pins (if you or someone you know has soldering skills) or purchase a new Vision Processor D4 V4 board for the D405 and swap the original D4 V4 circuit board for the new one.  I would expect a replacement D4 V4 board to be around $80 USD.

   

  There are currently worldwide shortages of some RealSense camera boards and so it may take several weeks to obtain one from an approved RealSense parts stockist such as Rutronik24.

  https://www.rutronik24.com/product/realsense/99agar/17740098.html

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• SeungYeon Moon

  • June 16, 2026 08:44

  Thank you for the detailed information.

  I purchased the camera through an official distributor in Korea (Compuzone), so it should still be within the 1-year warranty period. However, considering there is some physical damage to the USB port, I have two follow-up questions before I decide to ship it to China:

  1. Warranty Assessment: Is it possible to check if this physical damage is covered under warranty before I ship it? For instance, can I send you close-up photos of the port for a preliminary evaluation? I want to avoid paying international shipping fees only to have the warranty rejected.

  2. Paid Repair Option: Just to clarify, if the damage is ultimately determined to be out of warranty (e.g., considered customer-induced), does RealSense really not offer any paid repair or paid replacement service? Is my only option literally fixing it myself as you suggested?

  Thank you again for your help.

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• MartyX Grover

  • June 16, 2026 09:38
  • Edited

  1. I can only refer to the experience of the US support team, but there have been past cases where USB port damage during use has been considered to be valid grounds for a replacement to be provided under warranty if the camera is less than 12 months old.

   

  2.  Correct, self-repair is the only option for cameras not covered by the warranty.

   

  You may not need to ship the camera to China though.  Customers should first contact the retailer that they purchased the camera from to enquire about the possibility of RMA return under RealSense's 12 month warranty.  In your case that is Compuzone in South Korea. 

   

  A RealSense support department may then be able to assist if the retailer refuses replacement under warranty, and it is in that situation that international posting of the camera may be required.

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• MartyX Grover

  • June 28, 2026 13:36

  Hi SeungYeon Moon  Do you require further assistance with this case, please?  Thanks!

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