Liquid Cooling Upgrade leads to no display

[wordsmc11]

Hello, Heroes of the Hp world!

I have a HP OMEN Obelisk Gaming Desktop;

Over the weekend i have installed a Corsair H80i V2 internal liquid cooling system. Everything in my opinion was fitted fine (any 120ml internal liquid cpu is a recommended upgrade for the HP Omen

When i boot the PC up now, everything works fine - fans running, led lights on with no beeping or flashing lights which i understand is supposed to happen should there be an error code with a HP?

There are three issues that i can't work out for the life of me!

1) The biggest issue is i have no display output whatsoever - both my gaming monitor with HDMI and displayport connections and also tried to hook it up to just TV with HDMI but no luck.

2) Sometimes when it boot up - it run off for about 10 secs and then switches off. After about 5 seconds thereafter, it boots back up fine and then stays on - other times it stays on from boot without switching off for the 5 secs at the start.

3) The USB inputs a the back of the PC work fine with things like my RGB mouse or speakers - but when i try to plug my RGB keyboard in, sometimes it works when i plug it in after booting and other times it doesn't work at all. It never turns on when i have it plugged in when booting the PC - hence i'm struggling to use shortcuts to restore BIOS etc (bit nervous about this step anyway). To confirm - the keyboard is not fault as tested independently.

I would consider myself fairly competent with computers - hence why i performed this upgrade but i'm really struggling to understand what is happening with it now..

Specs:
Intel i7
GTX 1660 ti graphics card

Please let me know whether this is something you can advise on

[Grzwacz]

Greetings,

Welcome to the forum.

I am not a HP employee.

Most Oblelisk PCs equipped with Intel motherboards have integrated graphics in addition to a discrete graphics card.

Issue 1. Are you connecting the monitor to the correct port on the graphics card? The rear I/O may also have these connectors. Integrated graphics is disabled when using a discrete graphics card.

Issue 2. You never have video even when the PC seems to start correctly, is this true? So sometimes the PC restarts. And sometimes it starts correctly at first power on (but you never have video). That would be some type of hardware problem if you are connecting the data cable to the correct HDMI port on the PC and the monitor has power and the monitor works.

Issue 3. Rear USB input problems could be caused by the connected device or a port/hardware controller problem.

The new CPU cooler should work if you followed all installation steps for an Intel Socket 1151 MB using the Corsair Quickstart Guide (Link).

Were you able to connect the Corsair pump to a USB 2.0 header on the MB?

At this point I would go back to the stock CPU cooler to see if you possibly damaged the MB when installing the liquid cooler. Same symptoms using the stock cooler may mean you now have a hardware problem.

Regards