I am having DELL Inspiron 1545 laptop.My laptop power light is glowing all the day, even after I switched off the system. I don't know the reason?? Please suggest the cause if you know.

And also how to overcome this...

It could be that it does that when it sleeps? Like slow pulses every now and then. Or it could also mean that you are in need of a battery.

Good Luck,

Javi