My name is***** am sorry to hear that you are having this issue.
I will be glad to assist you with this.
What is the brand and model of the external monitor?
okay,I was wondering what type/model monitor you have?
What type cable are you using to connect the monitor to your HP Envy?
okay, What type cable are you using to connect the monitor to your HP Envy?
okay, do you already have an external monitor to connect to the HP?
okay, usually the usb monitor cable/adapter has to be installed.
Does the external monitor have an hdmi input or vga?
okay, the usb to vga adapter has drivers that have to be installed on the computer before it will work. Does any lights or sounds come from the computer when you power on?
no, that will not help. You will need to test the display, the USB adapter is the only way to connect an external monitor on the HP Envy 23. There are no other monitor outputs.
I am searching to see if I can find a plug and play adapter that does not require drivers.
unfortunately, there are not any adapters that you can use that does not require installation. The only option will be to get it checked at a local repair shop.