Dell Latitude D430 not powering on.

If your adapter is ok, the most possible problem is that your laptop dc power jack. So you may check it out. Either replace it or get it repaired.

Replacement Dell Latitude D430 AC Adapter 90Watt 19.5V 4.62A

Remove battery + power cord from AC adapter. Wait 10 minutes. Plug in only the power cord. Power-on the laptop.

If laptop starts correctly, plug in battery while it is up using the adapter. Leave on for battery to recharge.

1. Check and see if the LED is on with the AC adapter, if possible, try a different Dell AC adapter (ANy D or E series Dell with a cannon plug connection should run that system Also ensure that the adapter is plugged into the wall.
2. If a known good power adapter does the same thing or if the LED goes out as soon as the adapter is plugged in to the system then the motherboard is suspect

The computer doesn't need any drivers to recognize an AC Adapter. If you have purchased the correct AC Adapter for your laptop then it should just work when you plug it in. If it does not then my guess is either you have received a faulty AC Adapter or the DC Jack which you plug into in the back of the laptop is bad.
I am assuming your battery is dead and when you plug it in and turn it on nothing happens?
You can also try taking the battery out and try to power it on with the AC Adapter plugged in.

The Dell Latitude D610 takes a PA-10 or PA12 AC Adapter. It's 65W or 90W

For 90 watt Adapter the output voltage on your AC Adapter label should read 19.5V and 4.62A
At least that's what the Dell brand reads so it should be close to that.

It sounds like you have a bad AC adapter . When you plug it in to the outlet in the wall and into your computer , do you see a charge indicator light on the computer? I'm asking you this because even with a bad battery your computer should operate without any problems with the AC adapter plugged in.

Plug in the AC power cord, remove the battery, and try powering up. Anything? Any lights?
Remove power cord, hold in the power button for 30 seconds, then try plugging it in again and powering up without the battery. Any change?

Sounds like you may need a replacement for the adapter.

Can you borrow one for the identical model?

Check and ensure that the power requirements for the laptop are matched by the output voltages on the ac adapter.

Good luck

-Carlos:

which green light?

light from the ac power adapter or the light from the battery?

if ac power adapter you are referring to try a diff power wall socket if ac power adapter still off then replace ac power adapter alone.

if battery light is off but the laptop works fine with ac adapter alone try updating the laptop BIOS.

if ac adapter light turns off when it plug to the laptop replace motherboard.

Sounds like a BAD adapter. When was the last time it worked in the laptop?? I would try another adapter if possible. When was the last time the adapter work on the laptop?

the issue seems with the inverter board of the machine and chek once the machine at any other place.