You wouldn't happen to have some small orange washers left over from the assembly would you?
the six screw holes listed in the manual. Use screws in these holes for proper grounding, but do not over tighten.
Good idea, particularly as you got a MoBo warning to begin with .............. it may need resetting?
Find the CLRTC jumper on the motherboard. Clear the CMOS by moving the jumper, then replace.
( page 1-22 of the manual? )
That is what I described earlier as a thermal pad/patch. With one of those you should not need thermal paste, but YOU DO HAVE TO REMOVE THE PROTECTIVE LAYER FIRST!!!
Was this a boxed set of processor/ heat sink fan? If so, the fan probably had paste on it already.
Otherwise attach a couple of PC speakers via the pale green jack-plug socket and turn them on before booting ............. they will give you the BIOS beep codes where there is no case or onboard speaker. ;)
Did the case come with an on-board speaker built into the case? If so, find and connect it now. This will help you hear beep codes if it has any.
In the old days we always put the largest closest?
Plug in one memory module ( maybe the 1 gig ) into the memory slot closest to the cpu.
If you have set up a speaker of whatever sort, you will get multiple beeps if it is a memory problem.