Hi,
I think you are going to have to contact HP about this issue. This is the first I've ever seen a Purple error code, and research seems to be pointing towards the motherboard itself. This looks like a common error when the motherboard has not been "tattooed" properly. That's the process of individualizing a motherboard with a distinct serial number or some other for of ID.
I would speak to HP about what to do with this error code.
I hope this helps!