As it is difficult to remove the battery to do a static discharge you can remove the ram. Once youve removed the ram try to boot the computer and see if theres an error coming up . Once you have the error message reinstall one stick of ram and try to boot . if you get no joy there then remove that stick of ram and install the other and boot . If you can get the battery disconnected with no power cord connected hold the power button down for 2 minutes to discharge the system . If you can access the cmos battery disconnect it as well. Doing this should give you a clean boot . If none of this brings joy then remove the hard drive and see if you get anything at all on a boot .You may also want to try using an external monitor just to check that the screen hasnt failed . Hope something here helps