Dell Latitude E7240 :: Buzzing Sound On Touch Screen
Oct 16, 2013
I've recently taken delivery of an E7240 with the FHD touch screen option. I am generally quite impressed with the laptop except for one thing, the touch screen buzzes. The sound is similar to a hard disk working, a bit random .. not a constant noise. The sound will immediately stop when I put a finger on the screen though which makes me think it's related to the touch screen itself.
Rebooting etc. makes no difference... shaking the laptop, smacking it (gently) etc. has no affect.....
I realise these laptops are new so perhaps there isn't much experience out there...
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Aug 4, 2009
I am talking about the pack that's in between the laptop plug and the sock plug. I'm sitting about a foot away from it and I can hear a little buzzing, plus it is hot to touch (I can touch it for a few seconds though).
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Mar 14, 2013
How do I disable the touchscreen capability for an E6520?
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Dec 2, 2014
How to set up so that tap with two fingers on the touchpad will preform like the middle button on a mouse. Can find that setting in the dell touchpad program. I am on a dell latitude e7240
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Oct 30, 2014
I will walk away from my laptop dell E7240 for 5 minutes and it will go back to log in page. How do I change that setting. Also after a time it seems to go to sleep and knocks me off VPN connection during a web presentation if I do not interact with mouse during web conf. I have to use ctl alt del to log back in but then my VPN is gone. How do I extend the time the laptop stays active?
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Feb 3, 2015
A company bought laptop with model : E7240 & E7440, So those laptops come with Windows 8 product-key store on mainboard. I would like to get that number because those laptops werer installed Wiindows 7 from our Global IT but right now those laptops are transfering to new owner and Global license of Win7 is end. Is possible to get product-key from each laptop for downgraded the license to Win7 without re-install the OS ?
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Apr 4, 2014
We have bought a bunch of Latitudes E7240 and deployed them with the new Dell Data Protection | Security Tools (DDP|ST).Now we have discovered that if you attempt to login with the wrong credentials the device (HDD) will be locked.This is expected as it is one of the purpose of having Disk encryption enabled BUT if a user accidentally lock the HDD by typing wrong credentials you would expect to be able to UNLOCK it with the admin password. (You create one when first enabling DDP|ST)
So, the user forgot he's credentials and the screen only shows "The device is locked, contact your administrator" and with NO OPTIONS what so ever! How do I, as the administrator unlock the HDD? Where do I type the admin password?
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Oct 29, 2014
Purchased a large number of these laptops and I am having several problems with the touchscreen not working. The laptop doesn't even see the hardware. I reloaded the OS, re-seated all connections and it still does not fix it. With the screens on back order. Out of the 10 I repair a week, 8 are touchscreens not working.
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Nov 4, 2014
Original Win 8 Pro, then updated to 8.1 Pro, the back lit keyboard works OK. However since I refreshed the system due to the hangs up problem at start up, the back lit key board stops working. Re-updated the OS back to 8.1 Pro again still not solve the issue.Does the backlit key board need special driver ? The device manager shows the keyboard as standard PS2
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Jan 13, 2015
I have 2 new E7420 laptops that are replacing some older ones.
When I dock either of them, all I get is a flashing cursor on either the external screens, or the laptop screen. I get the Dell logo, then just a flashing cursor on the top left of the screen.
I can turn the laptop on, wait for it to boot, then dock it, but of the 3 times I've tried that, the USB didnt work once.
Have just upgraded to the latest BIOS, but it didnt change anything.
Is there some BIOS setting or something I need to change?
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Nov 3, 2014
I have just gotten an E7240 computer and have noticed that the USB ports on the back of my computer are disabled when the computer is docked which is a very unfortunate feature of this new computer model. It seems there are many people posting complaints about this feature on the internet. It basically takes a computer that has 3 USB ports and makes two of them rather useless. It is very useful if a USB receiver for keyboard and mouse can be plugged in to the back of the computer so that the mouse can be used easily when docked, but also when the computer is taken off the dock to go to a meeting room. This then leaves the side USB port available for devices such as wireless projectors when in the meeting room. Although this computer was designed to behave this way, I think that most users would agree that this is a critical issue that needs to be seriously considered and fixed by Dell as soon as possible assuming that there is not already a work around available.
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Oct 8, 2014
My Latitude e7240 when docked onto the PR03X docking station, the power adapter that is plugged into the PR03X completely goes dead. The only way I can reset the power is by unplugging and replugging the AC adapter FROM THE WALL. Tried the spacer. Tried double powering (1 adapter into the PR03X and another adapter into the e7240). Also tried plugging the laptop on first without power, and when powering up the laptop, it would boot up 10x slower than normal and sometimes hang. Also tried multiple other PR03X just to be sure the one i have is not faulty. The same problem is repeatable. The laptop has the latest BIOS.
It seems there is a power mismatch of some sort that would cause a) the adapter to fail, and then b) for the laptop to run extremely slow because of what?Is the problem caused by a faulty docking port on the e7240? I assume the PR03X is compatible to the e7240??
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Feb 26, 2014
Does the Latitude E7240 can support two external displays without a dock? Can have one plugged in to the mini displayport and one in to HDMI and output just to these displays?
Or is it limited to just the laptop display and one single external display?
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Nov 15, 2014
Latitude E7240 has Touchpad Alps. All works fine except settings "Flick" (Gestures -> Multi Finger Gestures).
This setting works, but after some time (random period) stops working. To fix this I need restart Apoint.exe or go to settings, deselect Flick and select it again.
My laptop's BIOS has latest version A11 and all drivers installed from web site Dell.
Also, I tried to install Windows 8 and Windows 8.1 with touchpad drivers only, but this did not solve problem.
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Feb 5, 2015
We have purchased and deployed a number of Latitude E7440's and E7240's and we are running into an issue with some of the E7240's. When waking from sleep while on battery power, the machine will start to wake, the display will come back and I can move the cursor but within a second or two, the cursor will freeze and the machine will become totally unresponsive. This doesn't happen on AC. I've set the power plan to 1 minute and tested over and over again and it is reproducible every time. The only way to recover from it is to power off the machine via the power button and restart it.
Right now this is happening on the original end-user's machine and 1 other deployed E7240 we were able to get back and test. I have a couple of other E7240's deployed and I have an email out to the end users to bring them in so we can check them too.
I've upgraded the BIOS from A09 to A13. I've tried switching wireless control from Intel to Windows. I've updated to the latest drivers on the Dell support site.
Machines are i7, 256GB SSD with 8GB RAM running Windows 7(64) Enterprise
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Jan 21, 2015
Just started using brand new Latitude E7240 and connected to E-port docking station. When booting an error pops up as below: The battery currently attached to the system will not supply enough power to dock for it to function. Please attach AC power to the dock for it to function normally
F1 - continue
F2- change setup options
The Laptop and the dock stations are brand new. This is only happening with the 7240's.
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Oct 6, 2014
We have several Latitude E7240's on our network. They are configured with Windows 7 x64. We have been having trouble with this particular model in regards to wireless connections.
When the laptop is powered on and the user logs in, the laptop connects to the wireless network, however it is not getting an IP address from the router. It sticks at "limited connectivity", and gives itself a "169" IP. It stays that way for about 5 or so minutes then finally connects.
The WLAN drivers are already to the latest version, and to "bandaid" the issue, I have to uninstall the Wireless NIC drivers then reinstall them.
At first I was thinking it may be a router issue (Which is a Sonicwall TZ210W), but it can't be because its wireless devices of differing models have no problem connecting and getting an IP address. Also, it starts working once the drivers are reinstalled (though I'm not confident this is a permanent fix).
All the E7240's have the Dell 1506 Wireless card, and are all and originally were) on driver version 10.0.0.268, A02. Also, I have tried turned off any power management settings of the WNIC prior to the driver reinstall.
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Dec 18, 2009
I just got my FW 590 CTO a week ago, and two days after I got it I noticed a buzzing sound coming from the display when the brightness is set to anything other than maximum.
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Jan 7, 2010
Sometimes when I am typing on my Mid 2009 macbook white there is a sort of buzzing sound, I have ruled this down to the magnet on the top left of the screen as if i put somthing magnetic near it i can hear the magnet moving slightly, I havent had this issue with my 17" MBP
Is this anything to worry about or is it a common problem? it only happens when the screen is at certain angles
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Dec 25, 2013
The USB ports on my new E Port II docking are not working with my new Latitude E7240 Laptop. Full configuration of the laptop is below. Talked with Dell and they sent me a replacement docking station but the same issue surfaced. Looked at the Device Manager and no extra USB ports show up when connected to the docking station. The side laptop USB works fine when the docking station is connected.
Computer Model Latitude E7240
Shipping Date 11/16/2013
[Code] .....
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Jul 18, 2014
I have a Latitude laptop as described above and for some reason it isn't detecting the SSD Drive.
It states: No Boot Device Found, press any key to reboot
I read on the Dell support website the laptop may need setting up in maintenance mode?
However after pressing alt+f at the Dell logo nothing happens it just tries to boot.
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May 25, 2014
We are running more than200 dell computers in our company. lately we purchased E7240 for some users but it looks like the AC adapter does not work with the Dell E-Port docking station we have and that cause the USB hubs not to function at all.
Currently the workaround is to plug the AC adapter to the laptop instead of the docking station.
Our BIOS is updated to the latest version. also a message comes up when the ac adapter connected to the docking station before the windows boot up saying the ac adapter won't charge.....
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Mar 4, 2010
I therefore have felt the need to come back, because I now now have a new problem (well its actually been around for a good few months). This problem is also a buzzing noise, but this time from the speakers and in particular, what sounds like the subwoofer. They randomly start making a crackling/buzzing/distorted static sound at random intervals when listening to music or videos or when using Skype, etc.
I've had this problem for a while and it hasn't bothered me as normally going to 'Acer eAudio Management' and simply swapping to '5.1 Output' and then back to 'Built in Speakers' solved the problem, albeit temporarily. Its been more of an annoyance than anything.
However, on Tuesday (2 days ago) I got my copy of Windows 7 through the post to replace my Vista installation. 7 is fantastic it really is, but since I have installed it all hell has broken lose with my speakers. The buzzing noise is now much more frequent, particualry when simply opening something such as Skype or Windows Media Player, whilst listening to iTunes. Swapping between the '5.1' and 'built in speakers' does stop the buzzing, but now, it comes back almost instantly.....................
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Feb 6, 2009
While watching a DVD last night in OSX, I noticed a buzzing sound in the right speaker when I was above 70% of the volume.. At half the volume, I don't hear the buzzing noise. It's kind if annoying especially when you're watching long movies. Anyone else have this problem?
Oh yeah, and my CPU temperature went up to 90C. Is watching a DVD that cpu intensive?
I have a feeling this thing is going back..
(15" MacBook Pro)
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Jan 28, 2013
Whenever i plug in my headphones into the audio jack i get a buzzing sound that is quite loud and irritating. However, the normal speakers are working fine with no buzzing sound.
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Feb 17, 2014
When one turns off the Bluetooth adapter from the tray icon, the tray icon disappears. In order to turn the BT adapter back on, it appears one must go to the Device Manager to re-enable the BT adapter. This is inconvenient and not awfully intuitive for a usual business end-user. In the past the BT icon in the tray would remain, but turn color to indicate it's off. And the end user could right-click it and turn it back on when needed.
Currently it appears, turning off the BT adapter, actually disables it and it "disappears". Is there a way to simply turn the adapter off and more importantly back on without having users get into the device manager from their standard user accounts?
E7240 with Dell 1601 WiFi/BT adapter in use on Win7/64 Ult.
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Jul 7, 2014
When I checked the battery status window in DELL Latitude E7240, I found 2 battery,Battery #1 it charged to 100% without any problem but Battery #2 is "not present",if there external battery available for this model or not? and if not, Why the battery status window showing two batteries in the settings?
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May 28, 2014
I have a Dell Latitude E7240. My issue is that when it is connected to the D/Dock station, the rear USB ports are automatically disabled.
Is there a way to have them enabled while docked?
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Jan 1, 2010
Recently my laptop starts to make a high frequency whining noise, almost constantly and rarely stopped.
I tried to locate the component which the noise was originated from, I can only figure out it's somewhere below the memory module, but there is no moving component there, so my biggest suspect is the fan, because if I put my ear to the back of the laptop, except the whining I also heard very minor "clicking" noise.
Another weird thing is, this noise only starts after Windows is loaded, not in BIOS or during booting, although the fan was running at those times.
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Jan 15, 2014
2 days ago I was given a new work laptop - the E7440 (its brand new).
Straight away I noticed some loud buzzing noises which a fellow colleague said was the fan. It's quite annoying. I soon noticed however when my laptop was idle these noises would stop, and when I clicked they would start again. Whenever I ask the Laptop to do anything these noises start up, and considering im active on the machine all day.
There are high pitched, buzzing noises. And as mentioned are aligned to when the laptop is processing something. They also make sounds when I scroll the mouse for example.
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