The LCD panel used in the ProBook 450 G6 has a 30pin connector which is very common in HP laptops, after suffering the 768p screen and finding some websites don't produce horizontal scroll bars when needed, I decided to do some research.
The ProBook 450 G6 also has a 1080p option, so is it just a case of changing the LCD panel?
Yes it is. I looked up the replacement panel for the 1080p model and bought one, I also needed stretch-release tape strips to mount the panel in the laptop case, I got these from Amazon.
There are numerous guides by HP on replacing the panel and stretch-release tape.
Key points to remember are matching the size, connector, and type (tabbed or tabless panel).