People asked me about it in PM, so here is a follow up. The problem is not solved.
I received a support message from Pimax to fully uninstall vive driver and vive port and stop any process and service about vive. They said to also finish the room setting in Pitool(not steamvr). They also said that if I find the pimax is still disconnected, to restart the service of Piservicelauncher to try. (in windows task manager)
It didn’t work for me.
I followed the recommanded advice.
I made sure Vive driver and viveport were uninstalled.
I checked the process list but this did not change anything.
I could not finish the room setting in pitool because the helmet was displayed as not tracked and as a consequence the next button was not clickable.
I have tried to restart Piservicelauncher but this did not change the situation.
I have checked that I have the latest firmware and chipset drivers for my motherboard ASUS Z170-A (Version 3802), by the way I tried the USB2, USB3.0 and USB3.1 ports.
I have formated the harddrive and have installed a clean version of windows 10 x64 with latest updates, then I only installed the motherboards and chipset drivers, Steam, SteamVR and pitool 22.214.171.124. Even giving it administrator rights, Pitool refuses to launch: the pi logo appears for a few seconds and then disappears, the pi logo remains inside the windows tray until the mouse hovers over it, then it disappears. The pimax stopped showing a grey image and is now dark, it does not turn on anymore. I was not able to launch pitool with a clean install of windows.
I have returned to an old hard drive with a windows 10 that has plenty of games installed , I have installed pitool 126.96.36.199 and launched it succesfully. only, then I have plugged the pimax. The pimax now remains dark even if I press the power button for a short or long time. There is no chime sound when I plug the USB or unplug it. PiTool displays “Disconnected:Diagnose(10500)”
In addition, I measured the unloaded (unplugged from Pimax) output voltage of the switchching adaptator (the small transformer you plug into the wall), it reads 12,3 Volts which means the power supply is functionning normally.
I have not received news from Pimax for the time being, I will be unable to have access to the helmet for the next two weeks, so I’m a bit frustrated but I hope by the time I come back, that a software update will fix all these problems.
I am going to order an USB PCI card, just in case the issue is with my motherboard.