M18x R2, HDD not detected in bios

So nothing was detected?

then it might be a cable issue with the Santa ports OR if the computers BIOS is corrupted or old, it might not detect all or none of them.

If all 3 drives cant be seen then your problem will be in the ribbon cable or connector.

The Sata ribbon cable and the motherboard connector were the only sub-par components on the M18x R2. The ribbon cable is extremely fragile and so is the connector. Just check that the cable is still seated correctly in the connector and also check that the white connector tab isn't broken. Us tweezers to carefully lift up the connector tab and then push the ribbon cable down into the connector and push the tab back down. If you lift the tab up too quickly it can pull out of the connector and snap.

Also check that the connector isn't damaged. The ribbon cable can short out and cause the connector to melt - It happened to mine and my board is currently in for repairs due to this.

The ribbon cable can also break where it bends around. Make sure you never try to straighten the cable. It is supposed to stay in the bent position and straightening it will break it.

Yours melted @mattyb3?

How does that even happen?

No offense but like I’ve never seen anything like it.

The ribbon cable broke from removing it too many times over the years and it shorted out the connector

Dang man, sorry about that.

My Alienware 15 r1 had the keyboard stop working after we did the extreme cooling solution to it and the backlight still works but the keys do not.

Usually the keyboard and the RGB use different ribbon cables. It's possible that the keyboard ribbon cable is damaged or not seated correctly. Never had a 15 though.

Yeah, I think I’m going to sell that laptop today for $800.

Do you think that price is possible on Facebook?