I am having the same problem as Vajni , ( even worst ) I bought my laptop Dell 7450 ( I7 -5600) in Sept 2015 , and now Dell has replace the mother board 2 times , ( last one was in end of November 2015) . Today the same problem happen again , during one week randomly the screen turned black and back for couple of time and Sunday , God has called my E7450 to the haven .
I called Dell support in Indonesia, telling them the same story again about what’s happened to the laptop , and the answer was “ we are going to replace the mother board but we will ask a good one “ very weird answer .
I have been using dell since 1991 , without single problem , my last laptop was a E6400 Centrino , and had worked with this laptop in different harsh environment , ( never had single problem)
Now with this laptop pretending at the edge of the technology and high price , it is very frustrating to face such repeating situation without having Dell considering seriously this issue .
I would like Dell to replace my machine but apparently Indonesia support doesn’t seem to do so .
Least but not last , is to give up with Dell and seek other less branded but reliable machine with real support .
Really , really *** off customer .
Since the replacement, my laptop shuts down sometimes but it must be a temperature issue. It happens when the fan opening is slightly blocked or I leave it on the charger and the laptop is left on a surface that does not dissipate the heat, like a sheet in the bed 🙂
With that mother board the cooling is challenging and the ultrabook concept does not help to the design at all.
Unless I overheat it a but, this replacement is running smooth and reliably.
Were you able to figure out of the A04 BIOS update did anything on these issues?
We are starting to get reports of the 7440 and 7450 models starting to run hot also....
The Dell Latitude laptops and many others have a magnetic sensor on the bottom edge somewhere so that when the lid is closed, and the unseen magnet approaches, it goes into sleep (or hibernation mode).
If you are wearing a magnetic bracelet, like many of us do for "therapeutic purposes", your bracelet will often trigger a "sleep" or "hibernation".
Remove your bracelet for a while and give it a try - that should do it!
The BIOS update did not help. The issue is probably the air circulation. By now I experianced if there is a slight curvatute on the surface where i place my notebook, sooner or later it will sshut down. This happdned as well with the old Dell notebook lap pad. That one is curved as well. But at least it has a sliding mouse pad piece in the middle. When the piece is extracted, the notebook won't shut down otherwise it is a ticking "timebomb". The little tabs on the bottom frame could be a bit higher in desingn could solve the problem.
I have gone through two of these at my work. The first was not function properly at all. The second one randomly began shutting down when plugged in. I had to take it back to work to the docking station to get it to run. Then I received a strange red warning about a tagging issue and had to take the battery out. To do this you have to unscrew the bottom panel of the laptop. We removed the battery and put the bottom cover back on and only run it on the docking station or plugged in directly. The IT department is now ordering me another one. I'm not impressed with the technical issues of this laptop. As a business model its a an unreliable laptop in the field with these issues.