I am experiencing the exactly the same issue. I am trying to update from 1.06.10.1043 to 10.07.00.1043 on a model RZ05-0392. The firmware bundle updated the Bluetooth firmware but then fails every time at the USB connection. Same red IO button comes up immediately. Before speaking to customer service I tried the factory supplied USB-C to USB-A, then I tried two known good (i.e. tested on another device) USB-C to USB-C on two different computers and neither solved the issue. I then spoke to support who said to try repairing and try the firmware again, then reinstalling Razer Synapse and try the firmware if the repair didn’t work. I am going to jump on the support chat again but I am sceptical that they will have a fix. A really terrible experience.
has anything come of this? my device has literally just stopped working, not even recognized by my pc anymore.. red source button
There was no fix for me. Razer replaced the device.