Update my rift is dead.
Ok so if you are having trouble with your rift going black they recommend the following. Be sure all USB drivers are up to date and power management is off. Video card is up to date. Check cable at both ends for damage or bent pens.
Appears the random black screen is the rift’s death throws. If you open a support ticket they offer the option of a refurbished HMD.
Will update on cost and warranty.

I read your comment above but if I understand you correctly,  what you’re actually saying is your ordering a new PiMax 5K+ ...! Congratulations mate...!

@ Skeeter
You try this Before Spending any $$ on your Oculus..?

Oculus Logs for troubleshooting
(I didn't enter anything in log box... just gave me my logs ( .zip format) on Desktop so I could look at 'em

or ...

Oculus Tray tool  ( power management function) ?
Oculus Home  ?
Windows 10 updated lately....?

HDMI Cable Check ?
Can ya change/check on another computer's Video card ?

Just thinking out loud with my fingers on KB

I've had the intermittent Black screen/no worky worky before....  but I wasn't gonna let Oculus beat me outta another $250.oo+  

Just sat down & went thru  all the above....  turns out mine was the pwr management function ( on ) so I turned them all off.. no issues since

GL !

Pulled the logs and everything points to something in the HMD.
Its doing more than the black screen. getting some weird artifact of blue and red lines. Once or twice I have gotten static.

My Vive kept going black. I replaced my cable and it works fine now. Rift is a different beast but might or might not apply here...

Sorry Skeeter. I’ve been having temporary black screen for a while now in rift that sometimes requires me to restart. Please keep us up to date on your progress. Hope you get back up soon

Skeeter, how is your Oculus? I had been having momentary black screen with Oculus. Yesterday I flew for an hour and plugged Oculus directly into computer instead of usb and hdmi extensions. I had no black screen. I think the problem was my extensions.

I bought a new one.  
Mine was a direct plug into video card and usb.
I had more than black screens. Was also getting blue/red artifact with random screens of snow.
I am going to try my new headset cable in my old headset to see if it was a cable issue. On my log file it was showing where it was losing tracking also which makes me wonder if the cable or the headset plug is bad.

Well I’m still getting temporary black screen without extensions. I opened oculus tray tool and disabled power management. What do you mean in the above when you say Oculus Home?

Oculus Home?
Also be sure to check you power management settings in the USB settings in Device Manager.

What do I set usb settings to? I’m reading some say to try to switch USB port.

@(A/229)Rob--  Have a look here.... particularly Fix # 3

Oculus Black Screen  Trouble shooting

..>Wondering why the black screen issue is showing up for the two of you all of a sudden...?

Hawk

PS   just an FYI.... My OR is connected to my PC with HDMI  AND USB 3.0 cable extensions ( 10 ') into USB 3.0 ports directly on GPU/PC ( NO Powered USB hub)

ASUS ROG STRIX Z370  /// 1080 Ti (Gigabyte) /// 32GB RAM (DDR4) /// I7-8700K @ 3.70GHz /// SSD 970 EVO 500GB /// SSD 860 EVO 1TB /// Win 10 64-bit /// Oculus Rift

On thing also to try is have someone wear the headset and flex the wire down it’s length to see if you find a bad spot.