Dell Inspiron 2200 has been working fine, But now won't turn on.

unplug, take out battery then hold power button for 30 seconds then plug back in and turn on
if the3 laptap gos on without the battery you need a new battery

disconnectt the adapter+battery and HOLD the power button by 30 seconds. in order to eliminate any EDS, in the power. And try again.
However if the problem persist, test very well the adapter+battery and p.supply in the c.board of computer for some cold solder contact, etc God bless you

Remove the battery from its compartment on the side of your Dell Inspiron laptop computer.

Remove the power adapter from its plug on the side of the Dell Inspiron (if your laptop is currently plugged into a wall outlet).

Press down and hold the "Power" button on the laptop for one to two minutes. This will dispel the excess electrical current that is built up inside the laptop.

Put the battery back inside the compartment of your Dell Inspiron.

Plug your power adapter back into the side of the Dell Inspiron. Press "Power." Your laptop computer will now turn on.

hope this helps

change power management setting in your Dell Inspirion

Simply plug the wall charger in and take the battery out. It should run just fine. I have a Dell Lattitude D630 and do this all the time. I've also done it with other laptops

check the metal post inside the power jack connection. very carifully try to wiggle the metal post and see if it moves or if its there at all. if the post wiggles, it is probably broken and needs to be re-soldered...only someone who knows how to do that should as you could damage the board trying yourself.
also try plugging it in without the battery.
do any lights come on at all when its plugged in or power buttons are pressed?

You mentioned trying a different battery, try a different AC adapter.

When plugging in the ac adapter to the wall, see if the POWER LED comes on on the adapter, then when you connect it to the computer, see if the LED stays on.

If the issue occurs with both AC adapters (No battery installed) then the motherboard has failed. If one ac adapter works but the other doesn't then the adapter is bad

Try this trick. Remove the battery from the laptop and make sure the ac adapter is not plugged in also. Hold the power button for 30 seconds. Place the battery back in and see if it powers on. If not let me know.

Hope this helps.

Try to turn off the computer and remove the battery from the bottom of the notebook. Turn on the computer with just the charger plugged in. If it doesnt turn on. you may have a bad power port.

If it has no power/charging issue since that happened except that the indicator light doesnt turn on when you plug in the charger, you may just need a bios update. Click here. That's the bios update for the inspiron 2200 from dell's website. You should have at least 30% charge on the battery and the ac adapter should be plugged in so you can run it. The computer will restart and will come back normally after this. I'd suggest that you backup your files before running this.

Hey thats one of two things your (internal charging unit) if so your SCREWED if not its the sowtware issue witch means you gotta tweak the settings especially if you just upgraded your OS if tweaking doesnt work then re-install your OS then set your OS setting Correctly to the best of your knowledge have fun...it take a bit of patience and a couple hours i had the same prob.....seeya