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July 24th, 2025 20:32
Lattitude 7440 will not power on
I have a lattitude 7440 that will not power on. When i connect the power cord to the laptop the LED does not light up on the power cord where i plug it in to the c=port on the laptop. I checked on other laptops and it does lite up when plugged into another dell or even an HP so I have confirmed the charger is functioning. Pressing the power button does nothing either while plugged in or when its unplugged.
1 -Disconnected the charger and the internal battery and held the power button down for 60 seconds.
2 - with the battery still disconnected I plugged the power cord in to the laptop and:
A- LED Lights on the charger still do not lite up.
B- Laptop will not power up.
Next
1- Held down the power button, again for 60 seconds. No LEDs lit up.
2- connected the Battery, then plugged in the charging cable. Again, LED does not lite up on the cord. Checked both C-ports as well on the laptop.
3- Pressed the Power button and again nothing comes on.
I am at a loss at this point on what can be done next. I have tried all of the trouble shooting guides and the power cord LED never comes on. Switching to another cable has not worked.
Any help would be appreciated.
R
DELL-Jesse L
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July 25th, 2025 06:50
Click here for troubleshooting and resolving your laptop no power issue.
On laptops, the indicator that power is reaching the computer can be a lit LED power button. Alternatively, it may be an LED located in the upper part of the keyboard or along the front edge of the computer itself.
Try these quick steps to recover your Dell computer from a power issue.
Try the following steps to resolve a laptop no power situation:
Ensure that the battery is fully charged.
Remove the battery and disconnect the AC Adapter; Hold the power button down for 15 - 20 seconds to discharge the Static Electricity.
Reseat the battery on the laptop and power it on.
Remove the Battery from the Laptop and power it on using only the AC Adapter.
Ensure that the Power LED on the AC Adapter is lit. This ensures the functionality of the AC Adapter, also try another working AC Adapter if available.
Once you have identified a no power issue, you can find further information and troubleshooting help by checking out the articles that are linked below:
To receive assistance from Dell chat support, they need to verify the warranty status and ownership. Then you must troubleshoot with them. Click the "Get Help Now" icon on the right to start a live chat session. If already out of warranty, click here for the Dell out of warranty offering.
sooner89
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July 25th, 2025 16:57
Thank you for your troubleshooting steps. See the outcome below.
1 - On laptops, the indicator that power is reaching the computer can be a lit LED power button. Alternatively, it may be an LED located in the upper part of the keyboard or along the front edge of the computer itself.
Result: I have plugged in the laptop to a power supply that works on every other laptop in the office. I get no LEDs on the power supply itself or on the laptop. Pressing the power button does not get any response. I have also tried a secondary dell power adaptor and get the same results.
sooner89
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July 25th, 2025 17:03
Proceeded to try the remaining steps:
Ensure that the battery is fully charged. - COMPLETED
Remove the battery and disconnect the AC Adapter; Hold the power button down for 15 - 20 seconds to discharge the Static Electricity. - COMPLETED
Reseat the battery on the laptop and power it on. - COMPLETED, Laptop DOES NOT POWER ON
Remove the Battery from the Laptop and power it on using only the AC Adapter. - COMPLETED, Laptop DOES NOT POWER ON
Ensure that the Power LED on the AC Adapter is lit. This ensures the functionality of the AC Adapter, also try another working AC Adapter if available - COMPLETED AC Adaptor LED DOES NOT turn on when connected to the laptop I am having the issue with. It does work with any other laptop in the office, Light comes on when connected and laptops will charge as expected on any other laptop. Pressing the power button DOES NOT turn on the laptop.
ejn63
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28.6K Posts
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July 25th, 2025 17:38
If the LED on the AC adapter DC plug doesn't turn on when you plug it in while it is disconnected from the system, you have a dead AC adapter. If it does, but goes out on connection to the system, there is an internal short circuit in the system that will (and is confirmed by the other troubleshooting) require a replacement system board.