Dell Latitude C640 :: Computer Won't Start At All
Nov 19, 2008
I have a Dell Latitude C640 that was disconnected from everything for about 1 year ( power supply problems). Now I have a new power supply and the battery is charged, but the computer wont start at all. He doesn't go to the bios, he just start starting and after 3 or 4 seconds go off.
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Nov 9, 2009
Last week I replaced both the CMOS battery and the laptop battery.
The laptop worked perfectly while running on the battery. Then according to the instructions that came with the battery,
I changed all the power settings to never and allowed the battery to completely discharge. I then recharged it fully.
Now however the laptop will not boot up or even run at all on battery power. If the laptop is plugged into the AC adapter, all is well.
As soon as you unplug the adapter, the laptop shut off.
The battery is showing to be 100% charged.
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Mar 2, 2009
I bought a refurbished laptop from a distributor on ebay, who I discovered doesn't know the true meaning of refurbished. But to make the long story short, after I installed a new CMOS battery,
and purchased 2 new laptop batteries because the dead CMOS killed 2 other batteries, I now discovered the laptop will not boot up using just battery power with a full 100% charge.
When I press the power button, the battery LED's light up like it was charging the battery. It's 3 green 1 amber, and it dos this about 4 times before stopping. None of the lock lights, light up (just threw that in there in case it is relevent).
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Mar 22, 2009
i have done this several times before on diffrent computer, but this dell desktop is not doing what it suppose to do.
I put the Win xp pro in the cd rom and restarted the computer after I change the boot to boot from CD, and computer go to tart windows. i chnagedeverything and reset to defult and also diconnected the hard drive. nothing works. on F8 i also selected CD rom , and didn't work. this is a 3 years old computer that getting very slow and has too much junk on it from the kids and I want to format it. any ideas how i can go around this.
Dell - Pentium 4, 3.00 GHz, 512 MB RAM, Windows XP
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Dec 12, 2012
when i try to power the computer on i see the status lights on but the screen wont go on and after about 30 second the computer start beeping. what can be the problem?
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Jul 11, 2014
I have a HP G62 B01ET with Windows 7 Home Basic 64 bit and i have been using this computer for about 4 years and suddenly i got the black screen problem when i start my computer and when i disable my video drivers using safe mode i can use the computer on normal mode but it gets really slow and runs on a lower resolution and updating my drivers,bios etc.
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Nov 30, 2014
My HP Pavilion notebook series G7-1135sd will not start. I get no response from the on switch. Some lights do come on but the screen does not light up. I have tried holding down the on switch for longer periods - without success. I have tried taking out the battery - also no success.
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Aug 25, 2014
I'm running i7 inspiron with windows 7 64 bit.
When i start computer on battery and then connect external power it freezes.
I can't click anything.
I have all the drivers installed.
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Mar 27, 2013
I have a Dell Latitude d630 computer. Everytime i turn the power button to turn on a blue screen will suddenly pop up. It will not bring the dell loading screen up and will not bring up the option to "start windows normal". I have had the battery replaced wih a new one. I might think its the memory card or the screen itself. what to do next or at least on how to get the loading screen up would be great. And sometimes when i can press ctrl, alt and delete at the same time the screen will disappear and come back with the blue screen. And after sitting their with the blue screen after a while the "wifi" light will light up as well with the "blue tooth" light.
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Aug 26, 2013
I was about to do a factory restore on my computer later in the day, but i was unlucky that the computer stopped working When i turn it on it continuously beeps and won`t turn on, i have picked the option to `start windows normally` and even the option that checks/diagnoses the files (to fix the problem not letting me startup) but when it says `loading files` it starts beeping again and the process stops..
I also read that it `could` be a problem with the RAM, but maybe that was for a different problem or so, but if it is a problem with the RAM, then how can i fix it?
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Apr 26, 2013
I just got BT Infinity and whenever I download something or run speed test (speedtest.com) my computer disconnects from the internet and shortly after connects again. How do i fix this? I am running a dell latitude d600 with windows xp. Before bt infinity i just had a normal bt home hub and that worked fine. I don't think this is happening on other computers connected to the network but i can't be sure. I am using Wi-Fi, not ethernet and i haven't tried connecting via ethernet yet but the hub is in a different room and i cant move anything from room to room because of the set up.
A previous answer i got was to re intall my wireless router. I thought this had worked, but it only suspended the time before the disconnect for about 1 min. Then it just went back to disconnecting straight away again.
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Oct 22, 2009
I sourced a "new" motherboard for my dead Latitude C640 from e-bay and now have problem bootning.
The story so far....
The computer worked fine as i left it with the charger in overnight and the next morning it was dead. After surfing the net it was diagnosted that the MB-power part that was dead.
I left the computer lying around for a year and finally found a MB for a resonable price.
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Apr 22, 2013
I have Latitude D630 that has been having graphics issues. I reinstalled the graphics drivers previously by booting through the CD, and that temporarily solved the issue, but not my computer refuses to display anything upon startup. I can hear windows booting up, but I get a blank screen. I've tried booting from the CD like I did last time, but it hasn't worked.
I ran the mute button + power button diagnostic and it's giving me a code I've been unable to identify.
The code is:
Num Lock + Caps Lock + Scroll Lock blink 3 times with an accompanying tone, which remains the same.
This happens three times.
Then I get a quicker and higher pitched series of fives beeps that go in tone: low-medium-high-medium-low. Accompanying this, the following light sequence occurs:
Num Lock, Num Lock + Caps Lock, Num Lock + Caps Lock + Scroll Lock, Num Lock + Caps Lock, Num Lock
This sequence also repeats itself three times. Then the entire pattern begins again.
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Jan 27, 2009
I got a defective C640, completely dead, no charging and a charged battery did not work either.
I found a bad solder joint at one of the DC filters located under the PCB just under the DC-jack, easy to resolder . Found also that the videoboard was loose. Now it is working.
But then I had a strange problem, when I put down the cpu heat sink the fan stopped, and when I just lift it a litte bit it started!?
I could not solve this until I installed the speedfan program and marked the Dell square under configure > options and rebooted?
Then I have a leftover, a plastic piece L-shaped 2+3 cm with an hole at one end,
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Mar 4, 2010
dell latitude C640, BIOS A10
I don't see any boot from USB option..
The options are- Disk, HDD, CDROM, Modular Bay HDD, and a bunch of options involving NICs.
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Mar 1, 2013
I have a Dell Latitude E4310: My computer does not recognize my inter hard drive. I found thecd/DVD drive in my Devise Manager and it had "!" next to it and the devise status stated"Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged. (Code 19)"
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Jan 29, 2015
I would like very much for the USB ports (or at least one of them) to stay on when the computer is in sleep. I travel frequently and hotel rooms have limited power and I would like to keep my mobile phone plugged into the laptop. I've seen you answer a few questions on USB limitations and settings...
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Apr 17, 2014
I've had my laptop for a little bit under 2 months, so these are the things I have noticed.
Issue number 1: When you plug in the power cord into the computer, the screen freezes on what it is currently on. I noticed this issue because occasionally when I plug in my power cord, and try to use the mousepad to select something, the mouse pointer is gone! I have to unplug-replug the power cable to get the mouse pointer to show again. It seems to have to do with the screen
Issue number 2: when I carry my E7440 around in my bad, or have it shut for long periods of time >3 hours (I just simply close the lid), the computer will SHUT DOWN. The thing will shut down completly, even though I simply closed the lid! At first I thought it was just going into hibernate, so I disabled hibernate in my power settings. But nope, even when the computer is asleep, it will occasionally shut it self down for no reason at all.
Just now, I closed the lid on my laptop, and put in in my bag, then walked to my office about 10 minutes away. When I sat down at my desk and opened my laptop, to my surprise, it had shut down by itself! All of my open windows, browsers, and applications were closed, and upon opening chrome and microsoft word, I was greeted by "your browser did not shut down correctly" and "microsoft word has recovered files". This points to the conclusion that it was not hibernates fault, but instead a issue with the laptop itself shutting down when it is put in sleep. This issue needs to be rectified immediately if it is a widespread issue.
Issue number three: When the computer comes back from hibernate or sleep, the computer is very very sluggish, even when plugged in. It is sluggish forever, OR until the power plan is set from whatever it is to "high performance". upon switching to the previous powerplan from high performance, the swiftness of the system is restored. This indicates to me that the system is throttling itself after it resumes from hibernation, why. This needs to be fixed; many people (myself included) just thought that the system itself was slow and underpowered, not realizing that it was just throttling itself when it emerged from sleep or hibernate.
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Mar 21, 2009
I'm trying to switch out the processor of my E6400. When I put the new processor in and start the computer, the lights blink, sometimes the screen turns on (to black), but the BIOS never loads (or even starts). The computer then turns off, and the caps and scroll lock lights turn on, and the num lock light starts blinking.
Does anyone know what that blinking code means, and more importantly, why the computer isn't starting?
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Apr 25, 2013
I recently came to the same fate, Recently had my battery replaced by Dell which was wonderful n the mess up part is that I cannot get it charged on my Latitude E6420.
My flashing problem started when I had a power failure in my area while i had my note book on charge. I cant do anything without having to keep my notebook on charge. i doesnt start up without it being plugged in now n it doesnt even charge my new replacement battery.
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Apr 16, 2013
Dell latitude e5520 always boot with check disk, with out giving the check-disk command.
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Aug 10, 2012
We have an unusual problem with a Dell Latitude E5520. It has been built with Windows 7 32bit SP1 and McAfee EndPoint Encryption, as we do with all of our laptops.
When the laptop is powered on and then docked, everything works fine. If you then give the laptop a restart whilst docked, it just doesn't! It shuts down and stays in some kind of power save mode. I have been through all of the Power options, including closing of the lid and turned off everything that could be causing this to happen, but still nothing.
If the power button is pressed whilst docked, the light comes on but that's it, no activity. Undock it, power up, close the lid and dock it again, all of the external screen, keyboard and mouse work as you would expect. I believe all of the drivers are up to date (it is a new laptop).
The docking station is an E-Port Plus DP/N: FFCV6 A00
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Mar 23, 2013
I recently formatted my Dell Latitude D520 laptop because of a frequent shutdown problem.
Also at the same time I have updated my BIOS setup file.
But now whenever i restart laptop, at the start up the DELL logo appears and also the windows logo and other messages appears in very small window rather than full screen size, till the machine gets fully loaded. Once the windows is loaded , it works well with full screen mode.
However, if i run any Command Prompt application, the screen get shrinks to small size, the same size which appears when the machine is booting.
On investigation, I found that
a) At every startup in BIOS setup Video/LCD Panel expansion is getting turned off and I have to manually enabled it at every startup
b) If i run any video/audio file the latptop instantly get turned off and may or may not restart for several days. Once it get turned off, it simply start getting turned off at every startup.
I have installed the drivers from the site, but problem persists.
Does it happens because I updated latest BIOS version? Shall i get old BIOS file from dell site?
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Jun 19, 2012
I have a Dell Latitude E6500 that I have been using for quite a long time. Recently it started acting up, and now it won't start up past the Dell logo. It simply goes to a black screen with a flashing dash. I've restarted it a few times, tried pushing F8, and gone into F12. I tried the Diagnostics through F12, but it takes an extremely long time and has never finished so far. I tried it again this morning, and periodically throughout the test a message like this has shown up:
Error Code 0123. Msg: Error Code 2000-0123 Msg: Memory - integrity test failed. The given error code and message can be used by Dell Technical Support to diagnose problem. Do you want to continue testing?
Yes or No or Retry
I'm not sure what exactly this means, but it keeps popping up. I would like to get through to start up my computer all the way, but that doesn't seem to be an option. Is there anyway for me to wipe it without F8? My cd slot won't open, and I don't have disks anyways. Is it possible to fix it via USB drives? Or F12?
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Apr 22, 2009
Do Vaio Z Series laptop owners use their laptop as their main primary computer or a secondary computer? Do Vaio Z series owners also have a desktop pc as their primary computer and use their Vaio Z Series as a secondary computer? Or is your Vaio Z Series laptop your one and only computer that you always use? Is it comfortable using the 13 inch screen for long periods of time?
Reason i ask is some people have more then one computer and some people just have one.
I'm just wondering if the Vaio Z Series laptop is a good choice as a main computer since it's got good specs and it's nicely portable but will the 13 inch screen be ok to use for long periods even at the higher 1600 x 900 resolution?
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Oct 24, 2011
I have a Latitude E6510 that will not start. When pressing the power button, the power light goes on for about 5 seconds and then turns off. I also notice the battery light flashes a few times when re-connecting the AC adapter.
Removed the battery, held in the power button 30 seconds, but still not working.
We have had this laptop about 6 months. About a month ago, it exhibited this problem. After talking to Dell Support, they recommended a system board replacement. The laptop was sent in and the board was replaced. When I got it back and tried to start it for the first time, it did the same thing. I then pressed the Latitude "ON" button, and the laptop started.
Now it is doing the same thing, and I find it hard to believe that another system board is bad. I am suspicious about this "ON" feature, that maybe the laptop is "stuck" or something trying to get into the "ON" mode. Or maybe it is just trying to get into "ON" mode.
I am not sure what the "ON" feature does, but I have noticed a few other posts on the internet of users having the exact same problem. Again--I find it hard to believe a second system board could be bad.
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Jan 12, 2015
My Inspiron 5421 won't start. I can hear the drive start and after a few seconds I get a 4-beep code (RAM read/write failure). The warranty expired about 6 months ago.
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Apr 28, 2013
My Dell Studio 1555 won't start anymore. When I want to turn it on, I get a beeping signal (2 beeps) and nothing happens. I tried all possible troubleshooting tips from the dell website (disconnecting all power and hold power button, reconnect to power, checked battery with the button on the battery, all fine, can't get into bios because computer doesn't start at all) but nothing works. Recently I also checked if the motherboard is connected properly and there is no issue either.
I also purchased a new dell adapter because my old one was a little bit damaged. The adapter is like the old one, and it's originally dell and the correct one for the studio 1555 so it can't be the adapter. Laptop also doesn't start when the battery is not in and it's only connected to the power.
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Jul 7, 2014
I'm having this extremely annoying problem with my HP Pavilion dv6-model1334us. Everytime I try to start up my laptop it always shows the menu screen saying Launch Start Up Repair or Start Windows Normally. I've tried to do a system restore multiple times, but the screen just stops on a blue screen. No it isn't the Blue Screen of Death, but it does attempt to start but fails and stands on the screen until it automatically or manually shuts down.
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Apr 25, 2008
Looking for a Boot Disk or Start up disk for an Aspire 4720Z or a place to download one. She has been doing finals etc for the past week without it at college.
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