My system,dell latitude d600,. is not booting what can i do?

[damie2k3]

my system dell latitude d600 is not booting, when i switch it on, it will blink for 10 secs and then go off, it does not display anything and the light that blinks when i switch it on is the one like lock and number9 written on it, pls what do i do?

 

[CompTIA_Rep]

Sounds like bad hardware. Remove the hard drive and remove each memory module one at a time (boot with one and then with the other). See if anything changes.