USB-C no longer supports 2nd monitor

[Zakalwie]

Hi, 

I set up my home office around my work laptop, EliteBook 640.  I have 2 external monitors, 1 connected to my HDMI and the other through USB-C port. 

Everything was working fine up until the end of January. 

I went on annual leave for a week, and when I came back, my 2nd monitor no longer works. 

I hadn't changed anything. 

Drivers seem up to date, as does windows. I've checked cables and even tried a different monitor, the port no longer supports an external monitor!  

I've read the USB-C usage doc. and it says powers 'display port'. 

Previously when I travelled into headoffice I'd connect to external monitor through the USB-C and it worked fine. 

Any suggestions HP?  This extremely frustrating and time consuming. 

[DJHope]

Did you ever get a solution for this? I'm experiencing the same issue. 

[Zakalwie]

Nope.  No response from HP at all and no solution found. 

Weirdly, I went on annual leave for a few days, came back and it was working again for about a week.  Then went into the office and it randomly stopped working. 

I have raised it with my work IT support and they've never heard of the issue. I personally think it's something to do with updates and power distribution settings.

I've got an Elitebook and for the cost it should be able to power a monitor, especially when plugged in. 

Did yours stop entirely or work randomly like mine?