psychedelic display

[lcrombie]

All in one displaying psychedelic colors.....What to do?

[WAWood]

An All-in-One although looking like a desktop is basically an oversized laptop -- with all the downsides of a laptop and none of the upsides.  The major downside is the extreme difficult in servicing it because you have to PRY off the case back and in doing so, that has a HIGH risk of cracking the screen.

You could connect an external monitor using the HDMI output jack in the back.  If the monitor shows the same issue, this indicates a failing video chipset -- and that usually requires replacing the motherboard -- a very expensive process.

If the monitor does not show the same, this indicates a failing display panel -- with the same issues as replacing the motheboard.

But at least, if you do this, you will have a better idea of what would need to be replace.

HP does not service used equipment so you would have to find a repair place willing to do the repairs -- but be sure to get a full estimate because either repair is likely to cost more than just replacing the All-in-One.

Unfortunately, all too often, folks buy these kinds of PCs for convenience and don't anticipate the problems they are going to run into if the PCs later need servicing. If this model is still new enough to be covered under the original warranty, you should contact where you bought it to see about returning it for a refund -- and purchase something different like an actual desktop PC.