Media test failure onboot

[Sialslagdlabldbq]

Just disassembled my laptop to apply thermal paste and Clean fan.

Got this msg on bootup:

Pxe-e61: media test failure, check cable
Pxe-m0f: exiting Broadcom pxe rom
No bootable device -- insert boot disk and press any key

The keyboard works tho
All cables, as far as I could tell when. I double checked, were securely attached

 

[ffg7]

your hard drive is not connected so reseat it.