Can you guys get me pointed in a direction here ? Here's what happened.
Working on Dell Inspiron M140. It's about two- three years old. It will not turn on. When I push power button, nothing happens. If I take battery out and plug directly to to outlet, it will not turn on. If I let it charge with battery in it will not turn on.
This happens too- If laptop has battery in, and then I plug in charging/ power cable as soon as I plug in the cable the little green light on the transformer ( on the power/ charger cable) goes off.
I would say the battery is bad, but again, when the unit is plugged in directly to wall, with battery ejected from case, it still dosen't turn on.
When power indicator button on the battery, all the lights come on, indicating that the battery is charged.
Well, this post is a little difficult to understand but what I'm getting is it doesn't matter how the system is plugged in or not plugged in and running on battery, the system just won't start. Without knowing more it's hard to say for sure. But if the system gets no power at all, even with a charged battery plugged in, it's definitely possible that the motherboard has gone bad.
I guess I would try unplugging the system and with the battery removed, hold the power button in for about 10 seconds to flush the power from the system. It is possible, not likely, but possible that this will clear up some residual issue that is causing it to not boot. You could also try re-seating the ram if you're comfortable doing so, it's probably not going to help but it's still something to try.
I think fusion hit the nail on the head here. You've tried every possible scenario with regards to powering up the unit and it's still not working. Definitely sounds like a bad motherboard. Time to contact Dell.