Powered on after many months, the leds were ok but the usual initial beep was missing and the monitor remained black.

Probably because I used a different PSU (weaker anche cheaper)...

I can sell working CPUs and several RAM modules in the same shipping. If you don't need the included case (or the heatsinks), please tell me before buying.

I have also the original upside aluminium cover of the 2U case, but if you prefer I can sell the configurato in the last two photos with 2x 2U case in order to container the supplied heatsinks in a closed case.