External Monitor Detected But No Signal on HP Spectre x360

[Ida234]

I recently bought an external monitor to connect to my laptop for better productivity, but I am having issues connecting the display. It is not connecting to the laptop, but I know it is registering the external monitor because my laptop automatically switches to Extend/Duplicate Display Mode. However, the monitor itself simply shows "No Signal." 

What I've done so far for troubleshooting:

1. I hooked it onto my phone and the monitor worked perfectly fine, so it does not appear to be the cable in terms of bad connection. 
2. I also made sure that my laptop is fully updated. 
3. Also checked the Display Settings, where I was able to see that my laptop recognizes the external monitor. The problem is that it recognizes the monitor as Inactive. 
4. Checked Device Manager as well as for Hidden Devices. It's present. 

So why am I still having this issue? Is this just a HP Spectre issue or is the port unable to connect to external monitors??? I do not know what is going on nor exactly where the issue is coming from. Looked through so many forums and threads but no solution.  Please help! Thanks.

Note: The adapter is a DVI to the Thunderbolt 3 USB-C. 

[banhien]

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@Ida234 wrote:

... Note: The adapter is a DVI to the Thunderbolt 3 USB-C. 

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@Ida234 

That is the culprit. Normally Thunderbolt™ 3 won't compatible with HDMI, DVI and VGA monitors. Does your monitor have Display Port ?

Regards.

[Ida234]

Hi, thanks for pointing that out! No, the monitor does not have a display port. It only have VGA and DVI. To connect the monitor to the laptop, would I need an additional adapter/cable? So that it would go from DVI to Display Port --> Display Port to Thunderbolt?