My friend was bored so he went to clean his computer. As most people do he took a vacum cleaner to the thing. . . Now when he tries to boot up it gives him a message wich i think is just telling him what graphics card hes got. Something like X300 128mb part number ... So i thought it would be a graphics card fault but it still displays the message. Anyone got any ideas? Im going around tomorrow see if i the computer will boot without the card in and try a few other things. edit: Looks like someone else did it http://www.techsupportforum.com/har...-solved-x300-dell-dimension-4700-problem.html
probably he knocked something loose check for loose data/power cables to the hard/floppy disks check that the graphics/sound cards and any other cards are pushed into the mother board edge connectors correctly
If it's not posting past that point then he's probably knocked the graphics card. Tell him to remove it and then re-seat it.
If there was something wrong with the graphics card, you wouldn't see that message! It sounds like the BIOS has detected an error and halted. Unplug any USB devices you have (it may try to boot from them if set incorrectly) and check the hard drive leads are in correctly. Can you get to the BIOS setup menu? Or perhaps the POST screen by pressing TAB?
Hopefully! ;-) Still, beyond trying simple stuff, I'd go with madhatter's solution - give it a reset and see what happens. Any word on this, Paulo?