P2419H, No VGA signal from your device

The laptop is a 2017 HP Probook 450 G3. Yes, it is basic VGA cable connection instead of display port connection.

Thanks.

@studyapple  I doubt there's a bug across all P2419H displays that prevents their VGA inputs from working if that model has a VGA input.  What laptop model are using, and is this just a basic VGA cable rather than something like a DisplayPort to VGA cable or HDMI to VGA cable?  Lastly, I see that you've tested the VGA cable elsewhere, so you've isolated that variable, but have you tested this display's VGA input from any other laptop, or tested your laptop with any other VGA display?  Those would be the next important variables to isolate.

Or depending on the laptop you have, do you have any other display output connectors, such as HDMI, DisplayPort, or USB-C?  If so, any of those could be used to connect to the P2419H (USB-C would require something like a USB-C to DisplayPort cable and a laptop that supported video output over USB-C), and using any of those would look noticeably better than ancient VGA, because VGA is an analog signal whereas all other options are digital.

@jphughan 

Thanks for the message.

The issue with the Dell monitor P2419H is the VGA port doesn't work properly.

1. Tried to connect the monitor via HDMI port to Mac laptop USB-C port (no VGA port on Mac), it can display.

2. The HP laptop doesn't have a USB-C port. I tried to connect it via VGA cable to the Dell monitor. However it says "No VGA signal from your device."

Thanks

@studyapple  interesting finding.  In that case I'm not sure what to tell you.  Maybe a bad batch of products made it out of a factory or something?  But I don't think it would make sense to assume that there's a known issue with the P2419H in general that causes its VGA input not to work, since after all in that case, why even have it on the display at all?

Also, I didn't realize there were VGA to HDMI adapters that allowed you to use a VGA source to feed an HDMI display input.  I've only ever seen VGA to HDMI adapters that are designed to support the opposite scenario (HDMI source device into VGA display).

@jphughan