dell dimension 3000 gone tits up, any ideas, diag light video

[stevieg]

the mot gas analyser computer at work has shit itself, found a goosed PSU so replaced it for a spare i had at home. its running 1 stick of ram which i know to be good as i have tested this in another motherboard. it will beep the 1-3-2 code when i try different ram in it even though both sticks are pc2700 @333MHz, it seems happy to some extent with the original ram installed but will not show video, not tried external graphics as its only got PCI slots (no AGP/PCIe). heres a video showing the diagnostic lights, cant find anything on this light combo on dell's website. wether or not the com card and disk drives are plugged in has no effect on the lights neither does having KB/mouse plugged in

http://www.youtube.com/watch?v=rx16uDrcvtA