Read through most all the Dell 3000 threads, my problem is a little bit different. Well, not the problem but the symptoms.
Power up: fans turn, green light on mobo. That's it, no beeps, no BIOS, no diag lights, no nothin'. The machine came to me after its owner upped the RAM, so I tried all the configurations and nothing. Reseated every removable part just for fun. Noticed the cooling fins on the CPU heat sink were discolored, and it gets hot right away with the cover off, but I don't know if that is normal for this machine.
The owner said she "vacuumed" it- but the best clue so far I have seen here is liquid canned air in the mobo. Any new ideas- or confirmation of probable DOA appreciated.