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87 Posts
1
452943
Latitude E7440 Display goes Black / Blank after "Starting Windows"
I suspect that this is a out-of-the-box issue (as the power button doesn't light up, either), but maybe I'm missing something... This particular unit fired up, as expected, and took our standard image. Somewhere along the way (probably during one of its reboots), I noticed that the display went out. Powering it down and back on didn't resolve it, nor did resetting the BIOS. Dell Diags run without issue, and I can boot Windows into Safe Mode...but as soon as I boot Windows normally, it blanks after "Starting Windows" flashes by.
jddfw
87 Posts
4
March 18th, 2014 07:00
radresch
1 Message
1
July 18th, 2014 08:00
I had the same bizarre issue. I think it has to do with magnets on the docking port on the bottom of the laptop. The magnets making contact with the laptop underneath appears to activate an imaginary dock and the laptops' screen and lights shut off.
missleman
94 Posts
0
March 17th, 2014 13:00
Connect an external monitor to the laptop. If the external monitor comes on normally then you have issues with your laptop screen. If the external monitor acts just like the screen....the you have motherboard issues.
DELL-Justin C
4 Operator
4 Operator
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783 Posts
0
March 17th, 2014 17:00
Greetings Jddfw,
It sounds like the image has a video driver compatibility issue.
Since it works in safe mode, boot back into safe mode and uninstall any video drivers and reboot to normal mode. If it works in normal mode with the video driver uninstalled, download the video driver from the following link and install:
http://www.dell.com/support/drivers/us/en/04/Product/latitude-e7440-ultrabook
You may want to download and update the chipset driver as well.
Please post back with any further questions or feedback on this and I’ll be happy to help.
jddfw
87 Posts
0
March 18th, 2014 07:00
DELL-Justin C
4 Operator
4 Operator
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783 Posts
0
March 18th, 2014 14:00
Jddfw,
I have never actually heard of that before, so I learned something new from you!
Thanks so much for posting back your solution. We will certainly note this in our knowledge base in case anyone else comes across it.
Thank you for using the Dell Community Forum.
jddfw
87 Posts
0
March 19th, 2014 06:00
-------------------------------------------------------
Sent: Wednesday, May 29, 2013 1:24 PM
Subject: FW: Don't Stack the E6430u! [UPDATE]
There’s something in the front end of the laptop, right where you would open it up, that causes the unit’s display to turn off. A magnet, perhaps…as part of the webcam and/or microphone assembly? Weird!
Nothing a client would run into – just us IT people.
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Sent: Wednesday, May 29, 2013 1:07 PM
Subject: Don't Stack the E6430u!
Sometimes when I’m working on more than one, I’ll stack laptops. In the case of the E6430u, I wouldn’t recommend it.
I don’t know if it’s a function of the accelerometer (if this model has one) or the display, or the battery, but if it’s stacked, it appears to lose power…and won’t run unless it’s held level(?).
tzarder
48 Posts
0
March 19th, 2014 09:00
DumSkidderik
18 Posts
0
March 17th, 2015 03:00
I just had this happen today with two E7440.
Here's a video showing it in action:
https://onedrive.live.com/redir?resid=BDB787B078CC1FDA!69693&authkey=!AKl_Yo1cQiZaDi8&ithint=video%2cmp4
That's properly weird!
bradberryb
1 Message
0
May 2nd, 2016 21:00
I am having problems with my E7440 laptop, I have a docking station but when I connect my laptop on it my monitor goes into safe mode. I have used this set up for a year now. I also purchased a USB adapter to connect the monitor that way because I thought it was my docking station but it does the same thing. Can you help please. Thanks
hermanb81
1 Message
0
November 28th, 2016 01:00
Hi all,
hope can give solution. i have deploy more than 10 new laptop e7470 since 3 months ago. and found more than 3 laptop have problem no display. but when you connected to external monitor its appear.
than i try to compare with good laptop side by side. its weird when i change RAM position right to left. its working fine. button power also lighting up.
gustech35
1 Message
0
December 19th, 2016 11:00
Go to control panel / power options / switch all the options off
Irishmfoh
1 Message
0
December 22nd, 2016 07:00
Switching all screen power options to never worked !!!! Thank you so much
OakHillSchools
2 Posts
0
October 20th, 2017 07:00
I just want to add something since this thread helped me. This is for a Dell Latitude E5440
Symptom – when turning on, the power button does not light. The front LEDs do indicate power. The backlighting works in BIOS and starting Windows. When Windows loads, the LCD backlighting turns off.
Problem – Laptop is telling Windows the lid is closed.
My fix – the ribbon cable under the keyboard was not fully inserted.
Additional info – The lid sensor on a Dell Latitude E5440 is located on the left side directly to the left of the ‘ESC’ key. The magnet that triggers it is in the lid.