Dell :: Latitude C640 Won't Boot From Good Battery
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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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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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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Dec 25, 2008
I think it could be a good thing to summarize what is good and bad about Latitude E6400 and E6500 in a separate thread. Especially for newcomers it is a little bit hard to find this information in the 135 pages long E6400 Owner's lounge thread. I will start with my experiences after seven weeks use of my Latitude E6400.
My specs
E6400 with P8600 CPU, Intel Graphics, 1280x800 CCFL screen, 160 GB 7200 RPM HD, Intel 5100 WiFi, Bluetooth, 6-cell battery, E Port Plus docking station, Windows XP Pro with SP3 (own installation).
Good
Very good Windows XP performance with own installation
LCD screen has good brightness and contrast
Battery life is great
Overall temperature of CPU, chipset etc is low
Audio quality in general is good on my laptop, no skips or crackling audio
Hard drive and DVD drive are 100% stable in ATA/IDE compatible mode
The laptop has a good selection of ports that are mostly located in good positions.
Light and thin design
Fast 7200 RPM hard drive that is also quiet for being a 7200 RPM drive.
Bad
SATA drivers for running in native SATA mode (AHCI/IRRT) are not 100% stable causing some problems with DVD drive and eSATA drives. See below for details.
Fan is set programmed to run a little bit too often/too fast. See below for details.
Occasional delays in Windows Explorer when clicking on folders. This seems to be caused by a lag that appears when the sound "Start Navigation" is played when clicking on a folder.
USB ports on the back of the docking station wiggle a little bit. I will get a replacement docking station that I hope will fix this problem.
Fingerprint reader is connected to a peculiar "Broadcom USH CV" device making it inaccessible for standard fingerprint software. I have got myself a UPEK USB fingerprint reader instead that works much better.
Dell ControlPoint software is bloated and not entirely stable. I have only installed the System Manager part that is more or less necessary and also works better than the other parts.
Overall impression
I am satisifed with my E6400. It is fast, has the features I need and is running cool. There are however some things I think Dell should have put more effort into before releasing the laptop like the buggy SATA drivers, nonstandard fingerprint device and the fan programming. I think Dell will eventually fix these problems but I do feel a little bit like a beta tester. If I had known about the problems before my purchase, I would probably have purchased the older (and hopefully more stable) Latitude D830 model instead..............................
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Mar 11, 2009
I've been doing a lot of research lately and I have come to the conclusion that as far as the specifications go, the Dell Studio XPS 13 is what I want.
However, I am concerned about the overheating in the laptop, as reported by some reviewers on the net. I don't mind if I can't keep it on my lap (my dv6137tx couldn't be kept on the lap for too long either!), but I am concerned about failure rate increasing due to heating.
Also, I am wondering if its a good value for money given that it is costlier than the Studio XPS 16, 17, etc and still comes with only a 13.3" screen. I would be happy to hear from other Dell users, Studio XPS 13 owners in particular.
The rough configuration I was looking for before coming across the Studio XPS 13 was:
1. CPU = Intel Core 2 Duo P8600 (or better), [1066 Mhz FSB with 6 MB L2
Cache preferable]
2. Memory = 3GB DDR3 at 1066 MHz
3. Graphics card = nVidia GeForce 9500 or higher
4. Hard disk = 250 GB, 7200 RPM
5. Screen size = 15.4" or higher
6. 8x DVD ± RW Drive
7. Internal Modem
8. Integrated 10/100/1000 Ethernet card
9. Integrated Wireless adapter
Oh and I am interested in running Linux.
The Latitude E6500 cannot be shipped with the GeForce 9500 card and I am getting it only with an nVidia Quadro NVS160, which I understand is as fast as the GeForce 9200 .....
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Apr 30, 2010
I just bought a 7200 mAh battery 9 cell from ebay. It dont last a month when the perfomance drop more than a half. So Im looking for a good batt that dont go dead so easily.
This batt was great for the first days. It last about 4 hours in high perfomance playing and 6 in normal use. Now it last 1 1/2 hour playing or less.
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Jul 24, 2009
I know there are software apps out there that tell you how many cycles you lithium ion battery has been through plus how healthy it is
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Jan 29, 2010
Inspiron 9400 battery good but shuts down
Worked fine on AC or battery until I installed a new Dell battery a few months ago.
Subsequently, works only about two minutes on battery, then completely shuts down without warning and can't be re-started until re-connected to AC power. Adjusting Power Schemes "Running on batteries" in Power Options Properties hasn't helped.
Works OK on AC.
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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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Oct 13, 2014
I have a ThinkPad x240 that is about 2 months old running Windows 7. Everything has been working great until this morning.  I was on vacation and did not use my laptop for a week or so.  When I plugged it into my docking station this morning, I noticed that the battery was reading 0% charged and was not charging. Â
Â
Lenovo Power Management showed that the battery is in good shape
Lenovo Power Management showed that there was "no activity" - not charging
Lenovo Power Management showed no battery #1 - battery # 2 installed but not charging.
Troublshooting so far
Tried charging with external power supply outside of docking station - No Change
Removed battery, powered unit up and removed all Battery items in Device Manager
Reinstalled battery and powered unitup - No change
Removed and reinstalled the Lenovo Power Management and Driver / rebooted - No change
Current state: No Power Management software on the laptop - just using the Microsoft stuff (Still not charging). What else I should be trying / checking?Â
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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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Jan 25, 2015
Refurbished Laptop - latitude E6410. The battery light contrantly flashes on the Battery five or Six solid blue lights - Then three flashing lights.In addition, the Light on the Computer (  ) and the desk top icon for the power adaptor cord /battery says" Plugged in - Not charging".I ran the Dell Diagnostics (Fn key at bootup) but it found no problems.is the battery dead?Â
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May 15, 2013
My Dell XPS 15z is showing the following problem :-- if I try to boot it with the battery connected (and AC power either plugged in or not), the orange power light flashes briefly and then the machine shuts down- if I remove the back of the case, disconnect the battery, connect the AC power cable and boot, the system boots as normal
Other observations
- BIOS version is A07, I can not upgrade this to A12 as, when I try to with the battery disconnected it basically tells me I have to have a battery connected to do the upgrade- when I click on the battery status button on the side of the case with the battery connected, one LED lights- when I click on the battery status button on the side of the case with the battery disconnected, no LEDs light
What are the next diagnostic steps?What is the likely fault - could replacing the battery unit solve the problem or is is the component which charges the battery which is likely to be faulty?The laptop is 18 months old but only covered by a one year warranty with Dell.
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Oct 12, 2009
I know this is an oldie but it was one of the best DELL ever made.
I suspect it,s the hard drive ,but when i push start it goes to the blue screen with writing on it for a split second then goes to black and shows
safe mode ,safe mode with networking ,safe mode with command prompt , start normally, start in the last working condition
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Apr 27, 2009
It won't boot and shows only lines across the black screen or blurs when HDD is plugged in.
When i remove HDD (any HDD, i've tried three so far), laptop boots to BIOS.
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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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Jan 17, 2015
I have the latest Bios update and the laptop seems to suffer from wanting to boot properly on 1st attempt. Sometimes it will take up to 10 tries before it boots up.Â
Symptoms: Dell logs goes half and the machine freezes, sometimes it will just be stuck on the logo and not boot at all.
A brand new laptop with this problem is REALLY frustrating. I guess I have to log a call with them to get them to fix it?
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Oct 14, 2010
We image all our new systems in our organizations on SCCM. I've got one that is a puzzler. I will not get an ip from the server. Instead it displays the message "PXE-E51:No DHCP or proxyDHCP offers were received." No other computer has this issue. I does not get as far as the network boot so it is not a windows deployment service issue. And it senses if the cable is disconnected, and gives you a different PXE error. I have flashed the BIOS, no sucess. I RMA'd the motherboard, and no difference. Dell won't replace the whole system since it was a replacement for another DOA. I thought it might be that little daughter card that contains the NIC connection, but cannot see that listed on the dispatch site as a seperate part.Â
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Sep 20, 2007
When I press the start button on my Latitude c600, 2 green lights light up on the right side for power and hard drive, as well as the 3 lights for the keyboard. The lights stay lit for about 5 seconds then go out.
However, that is with the external power connected.
With just the battery, it lights just as above, but then blinks off and then on again for another 5 seconds. Wash rince repeat.
Additional information:
I removed the hard drive weeks ago to use in another system and I don't know if laptops fail to boot if there is no hard drive detected.
Before you ask, I tried reseating the memory.
Although I have worked for years on desktop computers, I have never dismantled or provided support for a laptop.
Also, I cannected an external LCD but that means nothing untill it boots.
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Nov 29, 2014
I have a Dell 4310 that I bought used without a hard drive. Â When I unboxed and initially tested it with another drive it booted into Windows 7, but, did not load because it wasn't the right drive.
The computer sat next to my chair for a few days until I got the new SSD drive that I wanted to install. Â When I put the drive in and plugged the system in (no battery yet) the battery light on the upper left flashed briefly and the power button came on and stayed that way for about twenty seconds. The screen remained black and the battery light and power button turned off.
This morning my son mentioned that he "might' have spilled a little bit of something on it. Â I quickly took it apart and carefully dried the pieces and parts on the heating vent and put it back together and the same thing happened.
I have tried the following:
1) Re seat RAM
2) verified video is connected
3) unplugged, held the power button for fifteen seconds and plugged the power cord back in.
What could I be looking at here, a new Motherboard?
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Jan 25, 2015
I was given a nice E6510 that doesn't boot. I've taken it apart and tested the memory, all the connections, reseated the processor (yes I used arctic silver) and it never gets past the 'one time boot menu', the diagnostic boot freezes but I CAN get to the very complex BIOS version A16.
So, I bought a new MOBO thinking that would solve the boot issue but it hasn't-it's doing exactly the same thing. may indicate the problem-Dell calls this an "OPTION ROM", may be 'unseated' or the system board is bad.
What is "Option ROM" and how can it be reseated? Are there any other things I can do in BIOS to change this? I also replaced the SATA CDROM and the hard drive, and I know the USB port works okay but nothing will boot from them.
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Sep 22, 2009
My D600 will not boot up unless the power cord is plugged in. Is there some switch that I hit by mistake? Can this be corrected?
I guess basically it doesn't work on the battery unless it is plugged in but the power shows 100 % for the battery
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Dec 16, 2010
I have a new dell latitude 6510 notebook and now i will install Windows 7 Pro 32 Bit again. When selected "Boot List Option" under bios settings i see legacy and uefi but i can´t "Add Boot Options" - Warning "File System not Found". Windows 7 Pro 32 Bit is installed and working under legacy but not working on uefi. When uefi selcted windows 7 pro 32 Bit is installed and when installation is finish can´t find bootable device.
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Jan 19, 2009
I have an issue with my Latitude D400 laptop which has now occurred twice. Basically, after operating normally and shutting down properly it has stopped booting. After the POST screen it simply hangs at a black screen with a flashing cursor in the top left corner.
Using the recovery console to repair the MBR and boot sector on the HDD has no effect. Neither does a repair installation of Windows XP Pro. The first time it happened I backed up, wiped the disc and started with a fresh installation of XP Pro.
However, it's now happened again. The hard disc is completely undamaged (all files are intact) but will not boot at all.
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Jan 16, 2015
I am having some real issues with a Latitude E5420. It will sometimes boot no problem, maybe 40% of the time.
Most of the time it goes to the dell splash screen and the bar goes to the top then i get a blank screen. No blinking cursor or anything. No HD activity, no CD drive activity.
I can press F2 and get in to the bios, i can press F12 and get to the boot menu but even after selecting a boot option from the boot menu i will still get a blank screen most of the time.
Once the Laptop boots up it runs fine and doesn't report any errors. A memory test has shown no errors. I have replaces the CMOS battery, which was a bit of a nightmare, i have replaced/swapped the memory modules.
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Apr 25, 2012
I own a Dell Latitude E5510. Â I *love* this laptop.
However, today I started having a problem with it. Â The laptop turned off suddenly. Â When I went to turn it back on, it began to load as usual with the following things on the screen:
1. the circular logo in the center of the screen.
2. the "press f12 for boot menu" thing in the top right corner.
3. Â the blue loading bar beneath the circular logo in the center.
What happens is the blue bar fills up, but then the screen goes black. Â It doesn't just instantly go black though. Â It starts from the top of the screen and moves to the bottom. Â It does the same thing when I press f12 to get into the boot menu.
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May 8, 2009
I have been reading about people getting so many hours out of their E6400. I have the 9 cell battery and running the screen on the lowest setting, Bluetooth off and wifi on im getting close to 6 and a half hours of battery life. Is this normal....
I heard about doing a clean install, what does this do, and what benefits would i be achieving by doing this?..
Is there anything else i can do to get a little more juice out of the battery when i need it? I plan to have wifi on most of the time when it is being used. Basic web-surfing and Microsoft word...
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Nov 18, 2014
I own a Dell Latitude E5530, which I bought used off eBay, and it was wiped to protect previous owner information, however, the owner did not reinstall Windows. I am getting the "C Prompt" as pictured below, and I would like to know how to reinstall Windows.
How to reinstall Windows with this popping up after BIOS?
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Mar 3, 2013
In the past we've restrict the boot options on our laptops vis bios sequence to prevent unauthorised reimaging of machines. However I've just noticed our newest Latitude e6230 still list all the devices as available despite these settings. Screenshots attached.
Bios configuration:
Laptop manual boot:
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