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By replaced battery, you bought one? Some aftermarket batteries do not work well with your laptop. I would return the battery as defective. Some aftermarket batteries are inexpensive for a reason. Make sure the Cord/charger and the battery are the EXACT same power specs, DC volt and Milliamps, or you may fry components.
If the laptop works fine off the power cord without any problems then
your power cord is ok, but if the battery is not charging then the
battery is probably dead and needs to be replaced. Batteries only have a
useful life, and when it's over they have to be replaced.
laptop does not work with the power cord then either the power cord is
bad or the DC Power Jack where the power cord plugs into the laptop. If
either of them is bad the battery will not charge.
Check your DC Power Jack which is where the power cord plugs
into the computer. Take an ink pen and push the tip inside the
jack and see if the little pin wiggles, if so the jack is bad. You'll have to
take the laptop apart to fix it. Most times it is soldered onto the
motherboard, so you will have to desolder the old and solder a new one.
If the battery shows a red color and it stays red even when the Power Cord is plugged in, then either the Power Cord is not charging the battery or the battery is completely dead and needs to be replaced.
The battery only has a useful life then it must be replaced because it will not hold a charge.
If you are able to use your laptop with the AC Adapter and Power Cord without any problems then the power cord must be ok and the issue is with your battery.
There are three possible reasons why your computer is experiencing this power problem. What you need to do is to isolate the component that's causing it.
These are the parts which should be checked: 1. Power supply 2. Battery 3. Motherboard of the laptop.
Here's the procedure that you have to follow: 1. Remove the battery from the computer.
2. Power the computer up with the power cord only without the battery on it.
3. Check if it works perfectly without any problems even if the battery is out. If it works, then, the battery needs to be replaced. (Note: Batteries are disposable parts. They usually die after 2 years of usage depending on how you use it.)
4.If no go even without the battery on it, check the ac adapter or cord if there's a light lit on the box of the cord. If no lights on it, double check the connection. If connections seem ok but no power, then, replace the power cord.
5. If power cord seem fine, check the hole in the computer where you plug in the cord. What you need to check is if there are any sign of damages. Wiggle the cord and see if there are lights lit in the laptop.
if you can use your notebook without the battery with the power cord attached, then the battery ist defective. If your notebook doesn't power on at all without battery, then the power cord is faulty.
Verify that you obtained an exact replacement power adapter for the Dell. If it is an exact replacement then try this. Disconnect power adapter. Remove battery. Reconnect power adapter without the battery. If it turns on, then power off and place battery back in. Then try again. If problem returns, there could be a problem with the battery itself.
Sounds like a battery issue. Try powering up without the battery, just AC. If it powers properly, then the battery needs replaced. If it doesn't then it may be the power supply malfunctioning, or the motherboard.