HP omen 25l not posting

[Eirik123]

Hello!

My pc is not posting. It is getting power, fans are spinning, every led light inside the pc (grapichs card, water cooler) is lighing up as usual, but I get no post. My mouse is lighing up for a second right after I turn it on, then it just stops. I have checked all the cables, replaced the cmos battery, resead ram, tested with a different ram stick and tested the ssd in a different system. The pc worked on friday, and I had a long gaming session. Everything worked perfectly, temps were fine. Then I just shut it off normally, then it isnt posting the next day. My guess is that the motherboard is faulty, Could also be the cpu or psu. I got the pc in februrary and the temps was really high, so I installed a corsair h60 aio. I've aslo installed a hdd and some fans. Everything has been working perfectly until now. 

Any ideas on what I can do next? And will the warranty cover anything if I have to replace some parts?

[Prométhée]

hi

Hard to say, since it seems that you have modified important elements!
Hp can deduce that this is what caused the computer to break down
to see now, if you remove everything that is added, and put everything back to the origin
If this does not work contact HP directly
You will not be able to change parts as you see fit and it is covered by the warranty, if that is the question
the computer will either be repaired by hp..
either for certain parts, in certain cases, hp can exchange you for example a Hard disk
This happened to me, and I had asked them to send me the HDD, rather than waiting, a long return/repair process at an HP center

HP PCs - Damage Not Covered by the HP Standard Limited Warranty | HP® Customer Support