Proliant with blue LEDs
This is my big old server, a Compaq Proliant 5500 which I got for £20 on Ebay. It's nothing special, currently a dual Pentium Pro 200mhz with 640mb RAM and a couple of SCSI arrays. However, to make it look more interesting I dismantled the drive trays and put blue LEDs inside, followed by a blue cold cathode inside the vent. This image is slightly out of date as I also replaced the power LED with a blue one. Now I'm just working out what I can do to get rid of that nasty green display.