Tannin

In Death - is a really nice archery game Racket Fury - a fantastic table tennis game but most importantly: Beat Saber. Imho Beat Saber is to VR what Mario Kart is to Nintendo Consoles, a total must-have and so good that even if you play no other game on the hardware it's still worth it. I have 107 hours in that game now, still not boring.

@VibrantNebulaNo, I did isolate it to the HMD, when I said "my everything else" that did include the cable going from linkbox to HMD. My Warranty has already expired unfortunately. Is there a point in getting a repair anyway, considering used Vive HMDs are sold separately for ~150 Euro on ebay nowadays from all the people upgrading to Pimax/Index/...?

@SynthesisThank you for your reply. I tried that but no dice. Over the weekend I had opportunity to try with a friends vive and it worked flawlessly with his HMD and my everything else. I also opened up the (presumed broken) Vive and found some dirt (could be dried sweat) below one of the cables connecting (i think) the displays to the main board. Couldn't see any damage beyond that. Cleaned the cable and reassembled but nothing has changed.

My HMD (original Vive) no longer turns on properly, the led goes red and Steam VR shows varying messages, usually something like "Put your headset on to wake it" or "Make sure the base station can see your headset" - which obviously I tried both. This started happening from one session to the next (worked fine one day, stopped working the next time I tried it). I don't think I updated drivers or anything but to be sure I installed everything fresh on another system and it has the exact same problem. It could be the dreaded sweat-problem (I was playing Beat Saber last) but I didn't notice any sweat getting into the headset and I also didn't/don't notice any visual damage. When I use the settings dialog to look at the usb devices I see something that may be interesting: If I disconnect the hdmi cable all usb controllers show up properly and the LED on the HMD is green but obviously the screen doesn't display anything. When I do connect the hdmi cable the LED goes red and also the usb controllers except for the main one show up as grayed out and start to "flicker". Also, there is no real difference between direct mode and the other one just the error messages are different. The headset is almost 2 years old so out of warranty and from what I hear the repair cost is prohibitive and the support bad so I don't plan on replacing it (not with an HTC product anyway) but is there maybe something else I could try?