Got this monitor for about 86NZD (yep it was a $3000+ monitor), monitor starts showing this red tint that most people would refer it to the monitor cable damaged or not plugged in properly in both ends. Had factory reset it, no luck. Played with the colour settings, one profile fixed it slightly but the tint still shows up. And it wouldn't be the GPU as its working perfectly. Even when nothing is plugged into the monitor, there is the red tint still. So I might suspect that something is failing inside the unit.
 
I also have plugged it to different machines from the 2nd PC to the Mac Mini G4, the Windows PC and even my Ouya, just in case if the DVI inputs are faulty on either side of the devices. No difference here. Any LCD experts here who can specify the failing part and if it's repairable?
 
And, for those of you who are interested in the red tint, here ya go.
 
The HP:
 

Compared to a monitor that is in perfect condition:

Again, it was a $3000 monitor, so there should be hope for this thing.

I'll see if that's the issue.
 
I should also highlight that the last owner hadn't used the monitor for a while since it was given to him. So I thought maybe a long run for the monitor could see itself rectifying the issue itself. The other possible problem would be the failing CCFL tube, although I'm not familiar with the LED back lit technology and it might not apply to LEDs, as oppose to traditional LCD back lit monitors.

Go the HP Support route for now - you can always try something different if you don't like their option later.  All things considered, that is a relatively new monitor (released in 2010) - I'm at a loss as to why it is doing what you describe and I cant find any search results on Google that leads me to believe this is a design flaw or known problem.  :(  Sorry, it seems like bad luck.
 
~Fus

Just an update on this.
 
I took it in to a shop to see if they can get it fix. 2 days later, they told me that at first, it's just a faulty main board that needs replacing. However, further digging showed that the panel itself has too many wear and tear on its components, which meant in order to get the monitor back to 100% condition, the board and the panel will need replacing, thus, making it uneconomical to repair.
 
So the only hope is to see if the monitor will repair itself until it hits a bang (dies), though this can be a rare occurrence.