I have a Dell Inspiron 5100. I've had it for about three years. One day it did the same thing, no power, no fan, nothing. I replaced the power supply with a 350 watt unit from Office Max. I spent about $40 and I'm using my Dell to send you this response.
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Your problem is that the power jack in your actual laptop is loose. it may not seem like it is but one of the 3 connections (positive, negitive, data) that hold the jack to the board broke. In this case its the data connection that tells the laptop what kind of adapter is plugged in, and dell laptops wont charge without knowing that. Solution-
1.Pay someone to replace the power jack
2. If you can solder, by a new jack (around $5) and disassemble the laptop and replace it yourself.
The power supply or mother board probably went out. Did any other items in the house stop working? This happened to me years ago and the electric company reimbursed me for damages.
You can try unplugging the power cord for a few minutes, then retry listen for any beeps from the computer. If it is powering on but nothing on the screen and no beeps *********** board is probably toast.
In most instances, just as you've described yours, the culprit is usually the charger. It's not uncommon for the charging system in the charger to cease to function while the power function continues to work. This is particularly true of Dell chargers.
If the laptop is still under warranty, call Dell Support and they'll almost surely send you a new charger because this problem is considered to be a possible safety hazard.
Since Dell's standard factory warranty is for 1 year, they should be able to help you. If not, and you have to purchase a new battery on your own, be sure to purchase ONLY a Dell charger
First thing check that the battery charge light is on when the battery and the charger are connected.
If it is it indicates that the power supply is charging the battery,
If it isnt it may indicate a fault with the battery or that the charger is not compatable with the laptop or that there is a fault with the charger.
If the battery is charging then try running the laptop on battery only without the charger and on charger only without the battery.
This will eliminate which one is faulty.
You mentioned that if you wiggle the cord then the light comes on again.
Check to see if the charger end plug is lose or the actual port on the laptop is lose.
If the charger plug is lose then return to seller and make sure they gave you the correct charger. if the actual port on laptop is lose then perhaps u got a bad connection and you need electrician or local laptop technician to open it up and solder properly on motherboard.
I would think the batteries need replacing. That happened to my Dell Latitude CPI. The batteries won't charge past about 3%, so I got new ones and that did the trick. If this is under a year old I would contact Dell about it, if it is under a year old they should replace the batteries.
Easy check is: power the system off. Unplug the power supply from the outlet. Hold the power on button in for at least 10 seconds. Remove the CMOS battery. Reconnect the power supply to power. Attempt to power up. See what happens. If it comes up and asks for you to set config, power down, unplug the power supply and hold the power on button for 10 secs. Replace the CMOS battery with a new one (CR2032 button battery...about $5 for 2 in the Wal-Mart photo dept) and power on. The reason for the repetition is to reset the BIOS.
Try these (un order of degree of difficulty)
1. Try replacing the battery on the system board. it is typically a CR2032 button-style battery. This helps if the computer has been off for a long time.
2. Make sure all dust has been blown or vacuumed out of the computer.
3. Check to see if the USB pins are bent inside the connector on the back and the front of the computer. Straighten if possible.
4. Remove add-in cards, fans, shrouds, and heatsinks, then check the system board for leaky or mushroomed capacitors. If you would like, this may also be a good time to see if the processor is seated correctly or possibly short-circuited (burned black on the bottom, burnt or missing pins, etc). If it is any of these, you may need a new system board (motherboard)
5. It may be that you need a new power supply. Do your best to make sure that it will fit your computer case and have all the power connectors you need; they are not created equal.