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The Latitude E7440 is an ultrabook by Dell released in November 2013, identified by model number 730-6964, with a fully usable touchscreen display. It is a high end business laptop built to be portable and sleek yet sturdy.

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Dell latitude power button blinking laptop not turning on

Please help me fix this laptop. The laptop was working fine but few days ago the charger sparked and the laptop is not turning on. I even ordered a new charger but it still does not turn on. When i press the power button the power light turns on and the laptop turns off. The laptop is also making a weird buzzing noise near the charging port which it was not making when the laptop was working. I have tried replacing the ram removing the hard drive and even removing the bios bettery but its still not working. I suspect the motherboard is dead and needs replacement so please help me fix it.



Dell latitude E7440

https://drive.google.com/file/d/12S4zv53...


Please see the video.




Thanks

Answered! View the answer I have this problem too

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As much i know BIOS check all the parts before starting, and it fails pre-boot. It is trying to start but fails due to issue in the board. It happens when there is any damage or short circuit in the board.

Spark in the charger send a high voltage into the battery and battery transferred to the board. Due to high voltage you're charging IC or mosfet has burnt out. You are right there is a problem with your motherboard.

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Hello Uraib, hello Elvis and all

The problem seems to me a bit earlier than the computer's BIOS level and absolutely not in RAM. Hardware problem of the voltage converter and short circuit in the conversion circuit. I do not know how the voltage supply in Dell is solved (I do not repair Dell) but it must be an interface that regulates the operation in front of the battery and behind the wall power supply. There will be a problem here. Usually such an electronic board costs a few dollars, max 20. Electronics repair may be a bit more expensive. Look for a broken counterpart (if you want to play with it, which I recommend) - inside you will find the replacement element I am writing about or find a good repair service. However, if you remove the board from your computer yourself and take it to a repair shop, the repair and soldering of the damaged element itself will take about 20 minutes and should not cost more than a few dollars.

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Uraib Lakhani will be eternally grateful.
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