First a couple of questions:
(1) What percentage of charge does the computer show after say 2 Hours charge, with computer off.
(2) Will the computer power on with just battery power.
(3) do you have a 2nd charger.
(4) do your batteries have a self test. My old compaq batteries had a test Button (not really a protruding button you could depress (Used finger nail) and had 4 led lites that indicated charge state (Not all batteries have this)
Some comments.
(1) If the Batteries will at least power on with just the battery, power on, stop boot process ie Hit F8 and select dos prompt, or if possible just let it sit waiting for a response. Run battery down untill the computer turns off. then try recharging the battery. I had a battery that would not charge, and this corrected the problem.
(2) get a 2nd charger to try - a little costly, but will rule out charger. Added. On charger - need same Eout (ie 19 Volts) at same current (ie 3.95Amps). Now the tricky on the Plug at the end must have the same polirity ( the metal shaft - negative, and the inside hole + Fairly standard BUT not gaurrentied). Comments inside () are for my toshibia. use e-tailer not Bestbuy as Bestbuy charges an arm and leg.
(3) can you boot to Bios, Usually a Function key, or the delete key right after hitting the power on button. In bios look for either Optimized settings, or fail safe settings and select, save, reboot. And try.