The case is new, an Antec sx635. I have new 256MB Micron DDR memory. I have one HD - Western Digital 102AA - 10 GB. I have an AGP Nvidia GeForce2MX200 Video card. I have a new Pentium4 1.6 Northwood. I have one floppy. I have a 56X cdrom. I installed the standoffs matching up the holes on the MB. I get one long beep and the LED stays at A7. I get no video on the screen.