TP,
Even if you are using a power cord to connect to laptop, with dead batteries, it will give way. Have experienced this with another laptop as well. Powercord has to run thru batteries - unless you can connect directly. I can relate to your issue, as with dying battery, and even power plugged in, a small shift of the wire/power cord, the laptop would go off... which means the battery could not sustain without even a few seconds off power.
Just my view....
Even if you are using a power cord to connect to laptop, with dead batteries, it will give way. Have experienced this with another laptop as well. Powercord has to run thru batteries - unless you can connect directly. I can relate to your issue, as with dying battery, and even power plugged in, a small shift of the wire/power cord, the laptop would go off... which means the battery could not sustain without even a few seconds off power.
Just my view....
Once again, it doesn't seem to be a battery problem. The laptop should power up even without the battery, right ? It doesn't.