Hi DrAndrew,
Thanks for bringing this question here. Persee is a standalone device, which requires stable power input to function correctly according to the instruction manual. If there was a mistake during the operation and Persee was crashed, by following the instruction to reflash the system image provided on the forum should be able to get it fixed. If reflashing the system does not solve this, please do not hesitate to contact us at info@orbbec3d.com. Orbbec does offer inspection and replacement services by following the terms and conditions. We are sorry for any inconvenience this may cause to you.