Black Screen With Flashing Underscore?
Jul 22, 2012
I encountered this problem two days ago while using my computer (hp pavilion elite) and it sht off on it's own. I tried to restart and it won't boot windows. Just a black screen with a flashing cursor at the top. I searched all over these forums and haven't found a solution that works. So far I have done a restore point, tried to reinstall windows from a recovery disk, I've used command prompt to Fix the boot record. Diagnostics says my hard drive is fine and I can see the newly installed windows 7 on my hard drive via the recovery disk boot. But when I try to boot from hard drive it still goes black.
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Nov 22, 2011
I tried to shut down my Dell inspiron when it said it needed to update some things and not to turn it off. Without realizing it I pushed the off button and now, everytime I try to turn it on it just shows the Dell logo and then the windows logo and goes to q black screen with a flashing underscore in the top left
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Oct 21, 2012
Today I started up my pc and after the BIOS screen (the place where you can press f8-f11 for various options) it went to a black screen with a blinking underscore in the upper left corner and stayed there indefinitely. It did this even after reboot.
I tried using the diagnostic tool and everything it tested passed (including HDD). I did this test twice and the same results were produced.
I also googled for similar problems (one topic mentioned that the op disassembling his computer and physically tapping a chip on the motherboard caused it to work) but I have no experience with taking apart my computer and i do not want to break it accidentally. I did however chance upon a topic advising him to do a CMOS reset which apparently helped that op, so i looked through the various options on the BIOS page. There was one option (f10 I think) mentioning CMOS on its fourth sub-window, so i pressed the reset option but I'm mot entirely sure if I used the right function.
I uninstalled kaspersky pure and replaced kaspersky pure for kaspersky anti-virus yesterday, dont know if this was the cause. I am using windows 7 64 bit.
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Aug 4, 2011
A few days ago I made a clean wipe on my Toshiba laptop, and installed Windows 7 Home Premium x86 as my OS. After installing the OS on my laptop, I proceeded to let windows update check for automatic updates and install them. After installing some updates, I clicked to have my computer reboot. After rebooting it showed the Toshiba screen with the F2, F12 options but after that it goes straight to a black screen with a white underscore. I pressed the power button to turn off then back on my computer and proceeded to press first F2 but it went back to the black screen with a white underscore, then restarted again pressing F12 went to the black screen again, restarted one more time pressing F8 for safe mode but nothing works.
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Sep 8, 2009
I was installing Windows 7 onto my laptop (previously vista) and install seemed to run smoothly (went past asking about. PC name, network etc) but after it said it was preparing for first startup, nothing boots. After restarting.. besides the startup Acer screen, there is only a black screen with a blinking underscore at the top left. Whats happening :S?
I've tried F2 and running a setup but it just shows me some specs and such
Btw it has 2.0 Ghz + 2GB ram x__x
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Sep 9, 2010
I just upgraded to Windows 7 on my Toshiba Satellite Special Edition laptop that came with Vista 64bit and the other night i downloaded iTunes 10 and told me to restart my machine so I clicked ok and then my laptop shut off and when it came back on the Toshiba screen came up as usual but seemed to stay on longer than normal then it goes to a black screen with a underscore that blinks for a few moments then becomes solid. Ive tried to use the "F" keys to get different boot options because i have the windows 7 ISO disc and a ubuntu disc that I could use but whatever i try my laptop wont process it just does the same thing over and over again and bever proceeds to the actually boot up windows.
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Apr 28, 2011
Recently did a new build, it's a couple months old now. Today I noticed that in between my MSI BIOS logo screen and the Win7 booting animation I get a flashing underscore on a black screen for maybe a second. I know this is a noob question but is this something normal I've just never noticed? The last time I saw something like this the system would only boot to a blinking underscore because the drive failed and I needed to replace it, so I'm a bit paranoid.
Mobo- MSI 890fx-GD70
CPU- Phenom II X4 970 (overclocked to 3.8 via multiplier only)
Ram- 8GB Crucial Ballistix ddr3 1333 (not overclocked)
HDD- Seagate 500GB Barracuda boot drive
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Jul 15, 2012
Recently I got this problem on my Acer Aspire 5742G where my laptop gets stuck on black screen with a flashing underscore at the top left corner right after the Acer splash screen. I can get into Bios but I can't get into safe mode (normally I could press F8 to get into Advanced Boot Options but this no longer works).
The problem started when I decided to try out Windows 8 Preview a few days ago. I managed to set up dual boot windows 7 home premium/windows 8 preview and it worked fine. But I only gave 20GB to the windows 8 partition and I decided I needed more. I thought it's a simple matter to transfer space by shrinking the volume of the win7 partition, format the new unallocated space and extend the volume of the win8 partition. But after I did this, all the partitions apart from the recovery one became "simple partitions" instead of "primary partitions". I don't know the difference between the two terms and I didn't think it was a problem so I just turned off the laptop once I finished with it. The next time I turned it on the problem started. Could this have caused problems with the hard drive? It's the only thing I can think of that caused the problem.
Unfortunately I can't find my recovery disc either.
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Jan 20, 2010
when my windows 7 ultimate computer starts up, the screen flashes black, just for a second which is ok. But if i enable aero and use the aero effects then the computer screen flashes black for a second again, everytime i use any aero effect! e.g minimize, thumbnails, show desktop, open files.
I upgraded from windows vista.
my cousins also have windows 7 ultimate and they use the aero effects without any problems.
their computer has A NVIDA G-Force, but not sure about the model, although it will be quite new because they bought their computer a week ago.
is it because of my graphics card? i checked the windows 7 upgrade advisor and it said my graphics card is compatible.
my graphics card is :
VIA Chrome9 HC IGP Family WDDM, and i have a Intel Core 2 Duo E4300 @ 1.8Ghz(i've been meaning to overclock but my mobo's rubbish :$)
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Nov 8, 2012
I am having trouble with my Toshiba Sattelite MG45. When I turn it on, I get a black screen with a flashing cursor. I have tried the F8 method, nothing happens. Also, I am running Windows 7 with an Intel Core. I am by no means tech savy.
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Feb 15, 2012
system goes to a black screen with a flashing cursor.
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Oct 5, 2011
First off I have a Dell Inspiron n7010 system running Windows 7 Home 64bit
OK the other night I shut down my system and all seemed fine until next day. I went to reboot and got the normal Dell splash screen with both the Set Up (F2) and Boot (F12) options. After the Dell screen finished it then went to load Windows, but instead I got a Black Screen with Flashing Cursor. Can't move cursor at all.
On the Dell screen I can access the Set Up (F2) bios pages. I can also access the Boot Options (F12) Page. What I can not gain access to is the Restore (F8) menus.
I did not know to make any sort of boot disk or boot repair disk so I do not have either of these and I do not know of anyone who is using windos 7 that could make me one to use. Also Dell puts the rstore on the hard drive so onlyhave a MS Works CD and a Drivers & Utilities CD l ran the diagnostics utility but forgot to plug in my computer so when it was almost done the battery must have died so will redo the test later as tired tonight as been up half the night with this issue. But for memory the first 6 of the 8 memories areas it was scanning tested fine. Will post an update later today when Iget chance to run the whole thing again!!
I know others have had this screen. Is there a solution as have spent the last day or so googling it and seems very mixed results depending on the user and their own case with this black screen w/cursor.Some have said bad hard drive (I HOPE NOT THE CASE FOR ME AT LEAST!!!) Some have said bad mother board. Some have said virus or malware Some have referenced a software update both Microsofts and also specific computer companies. So what can I do to get to my files at least to back them up that is providing the drive is OK! I do know from the boot menu my hard drive is showing in the boot menus. Does this mean that the drives OK but maybe a corrupted boot area or something?
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Aug 15, 2012
I have an Acer aspire 5733-6607 with Intel Core i3 CPU 2.40GHz.
My mom was on it playing a game on the internet and stepped away to wash dishes when she came back it was on the black screen with the blinking cursor in the top left corner. I tried system repair disc, the recovery disc that it had me make when I first got the laptop and windows defeender offline nothing worked. I tried F8 and it goes to the black screen with acer and where I can press F2 or F12 and then back to screen with blinking cursor. I tried restoring default settings in the F2 menu also.
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Aug 11, 2011
Have my Dad's Fujitsu Esprimo laptop to uninstall Searchqu, Bandoo etc for him which were causing problems. That went fine, computer shut down and tried to install Windows updates. Now won't restart.Hangs on Fujitsu screen with options for "<ESC>: Diagnostic Screen, <F2>:BIOS Setup, <F12>: Boot Menu" and Blue progress bar. Progress reaches about 75% complete VERY slowly (hour) but then hangs on black screen with white cursor in top left corner. Been like that for 2 hours now.Have tried solutions from Google - click F2 then re-setting boot order in Bios to "default order", click F12 and choose different options, tried F8 for safe mode, but F8 doesn't do anything.I don't know if it's related to Searchqu, to the updates or if it's just a creepy coincidence and the computer itself is actually broken. He doesn't have a Windows7 installation cd.
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Oct 10, 2012
Earlier this week my HP desktop forced shutdown while browsing the Internet using IE9. Upon reboot the HP screen loaded, afterwards a black screen with a flashing cursor appeared. I had used CTRL+ALT+DEL function in which my computer rebooted.Showed the HP screen and immediately showed the black screen with a flashing cursor. Again no mouse cursor was available. I performed a diagnostics check in which the CPU, HDD, etc. checked out, restored BIOS to factory settings, even placing the HDD as priority 1. I inserted the Windows recovery disk and attempted a start up repair, and a restore point with no favorable results. Through the recovery disks command prompt I accessed all my music and documents, so I assume the hard drive is still functioning. I'm thinking as a last resort of performing a repartitioning of my hard drive and performing a clean install of Windows 7.
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Dec 18, 2012
it won't power up little blue light flashing, screen stays black.
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Dec 11, 2011
Attempted to run chkdsk after Windows Update failed. When I restarted computer to run chkdsk, I got the black screen with the flashing "_". No pointer, if I push crtl, alt, delete, it just attempts to reboot. No other key does anything. I have removed the battery, unplugged the computer, but still get the same results. I am unable to get any boot options when pressing F8. Unable to boot from Repair disk, either. Ran diagnostics in F12, which showed all fine
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Sep 29, 2012
i have a acer aspire 5336-2460 laptop, everytime i try to boot into windows it gets stuck at a black screen with a blinking underscore in the top left. I tried making a bootable Windows 7 dvd and it still doesn't solve the issue. F8 won't work only F2 and F12.
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Aug 10, 2011
I upgraded my pc yesterday and reinstalled Windows 7. Now on the starting Windows screen I have a little underscore blinking in the top left corner of the screen.
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Sep 15, 2012
I don't know too much about computers and I just got a hand-me-down Dell Precision 320 PC from my dad just last weekend and it just crashed. I got a message saying something crashed and if this was the first time I saw it I just needed to reboot my computer. I proceeded to do so and then I got the mysterious black screen with movable cursor hanging scenario. I booted up the advanced boot menu and went to repair computer to "Last Known Good Configuration" and since then it boots up to passed the windows loading screen to a stock windows 7 screen and it flashes about every seven seconds with the cursor blinking to loading something back to idle. It hangs here until I turn it off. I am not sure if this has anything to do with the situation but there have been a couple of blackouts in my house due to heat that caused my computer to shut off a couple times.Safe mode gets the same resultsSFC found no errorsSystem:Windows 7 Ultimate 32bitIntel Core2 x6800 @ 2.93ghz8GB RamIf there's any other info I can provide without being able to boot my PC, I'd be happy to comply.
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Oct 15, 2009
I'm currently running a GeForce 7900 GT/GTO card that I've never had problems with. I updated the drivers for Windows 7 from NVIDIA's site.
However, whenever I go to switch display settings, open a video, open a picture, or just about anything else graphically intense (including start-up) my screen freaks out. The screen will go a solid color (of whatever the background is), get lines through it, and then start flashing. Then after 10-20 seconds (or whenever the program I was trying to run is finished) it will revert back to normal.
I can run Aero just fine. I can run normal programs such as the internet browser, control panel, etc. fine as well. It's just whenever I try changing my display settings or running a video, opening a picture, etc.
Does anyone have any ideas as to what might be the problem? I've run GPU-Z and my card isn't overheating either I don't believe.
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Oct 6, 2009
I've been using Windows 7 build 7100 happily for the past 6 months. But recently it develops a weird problem: The application window (like IE, firefox, outlook, explorer) flash quickly. I can see "Not responding" displayed in the title in between the each flash. I have Quad proc + 6GB memory, so the system slowness should not be a problem. The flash happens quite often, when I scroll down the screen, or typing, or have some user interaction with the application. I've disabled Aero interface, no help. I did Windows update, no help. Someone recommends removing nVidia driver, I did not try, as I have been using the same driver for the past 6 months without problem. I've installed Windows Security Essentials recently. But disabling it does not work either. Why do the flash start to happen recently?
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Jan 31, 2012
on a few certain site, like facebook, twitter, classic yahoo mail the screen erratically flashes
i keep my PC switched on for days on end, i'm also logged onto these sites, but sometimes i get the screen flashing, nothing i can do to stop it unless i restart my PC and it's fine until it starts again, it can be a day, to a few days
i think it may be facebook, as when i'm not on this site, it seems to be fine.
do you think it's a flash problem or something else i've just uninstalled flash & reinstalled to see if it's going to help
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Aug 23, 2012
i recently had to reinstall 7, because the computer kept crashing in the middle of the simplest things. say, i'd be reading a wikipedia article, or watching a Internet video, or playing a game, and the screen would all of the sudden start flashing for a few seconds, then it would just go black (70% of the time.) on occasion, it wouldn't go black, but instead becomes the color of the most prevalent color on the screen. ex: i was playing a game, and took a look at the map, which was mostly yellow. at that moment the screen would become yellow and freeze, not letting me move my mouse or ctrl+alt+del. sometimes a blue crash screen would appear, sometimes it would just restart on its own.so, anyway, i realize reinstalling windows has little to do with the above problem, but i was hoping it would fix it, and also i needed a new start, since my organizational skills were pretty bad before. once reinstalled, i had updated almost everything possible, via windows update, or manually.at first, i thought my wishes were fulfilled, because my pc was running faster and more smoothly than ever before. (i did have a little hiccup with sound card, but that's behind me now.) but, no. the black screen happened again today. that was such a low blow i wanted to jump off the balcony... i decided that the only thing i haven't updated was the bios, and, true, it was last updated in august 2010, 3 months before i got this pc. that hasn't helped one bit - screen's still flashing and freezing.
also, i've just noticed that after a few flashes the computer doesn't freeze at first, but the mouse pointer either disappears altogether or becomes thin vertical dotted line. but it still freezes after a few minutes. that's something new, but not an improvement. hopefully that helps you.[code] a quick flash or two, mouse pointer becomes a dotted line, and screen goes white (doesn't happen a lot, but has before) after 1-2 minutes. i was running 16-bit true color this time, but apparently that makes no difference.
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Aug 11, 2011
my son has a toashiba satellite pro L450D-12x it goes past set up screen then to a blank screen (in black ) with a flashing line in the left corner how can i get it to load properley? before it did this it said media cable fail or something like that and i restored bios back to restore settings and it was also turning itsself off now and again.
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Feb 23, 2011
This morning one of our computers started acting strangely. Any window screens we have open, whether an Internet Explorer window, My Computer screen, etc, the top bars are flashing in and out. It is similar to the flashing like when it is trying to alert you of an error message / box you have to click through to do something else. The home screen is fine, and shows no signs of flashing or flickering, it only shows on any window screens you have open. It will interrupt you when you are trying to open drop down menus etc as well. I have gone into screen resolution, but as soon as I open a drop down box, it will close as soon as the screen flashes again. However I was able to change the resolution to a lower setting, but it still flashed. I also tried to change the screen refresh rate, but there was only one option to choose, 60 hertz. The computer is an Acer Laptop, running Windows 7 and AVG Antivirus, but I dont have any other exact specs on it right now as im working from a different computer. My mother said it had updated last night with a possible new Windows update? Again the back / desktop screen appears fine, it just seems to affect any windows you have open.
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Sep 14, 2012
I am working on a Dell Inspiron laptop (model 1750) that boots fine to safe mode however, when i boot to regular mode the screen starts to flicker at the logon screen. No visible buttons are available to select the user. I have tried startup repair, uninstalled video drivers and scanned for and removed malware. The machine is running Win 7 SP 1(64 bit).
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Oct 10, 2010
I recently just installed Windows 7 on my wife's laptop. It previously had Vista 64 bit and now of course has the 7 64 bit version.Everything has gone pretty smooth. There were a handful of drivers that needed installed but otherwise smooth. The only thing that remains finicky is sometimes I get flashing at the bottom of the screen only, like only taskbar width. I had it stopped after installing the newest driver from Nvidia but then when I ran the benchmark test from Windows for its rating system purely out of curiosity it started again. Initially once every 2 seconds now about every ten, and sometimes longer pauses inbetween. Which leads me to believe that it may be to taxing of the video card and it just glitches out when taxed. Although it seems it is probably a setting on the card/resolution/refresh rate/driver that probably needs adjusted to get it out of this little spat since it never had a single issue when I used Vista.
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Oct 6, 2012
my dell computer xp windows 7 when i try to boot up it will just get to blue screen but does not bring up accounts or allow to boot up any further then blinks or flashes blue to black screen and back. I can boot in safe mode and i have scanned computer with mal-ware, mcafee, and eset scanner . have not found a virus. I did lose the ability to watch you-tube videos, and the last error i got was adobe crashed. i don't know what to do from here. I have windows disk and thought about booting from it and doing a system repair but when i put that disk in i do not have the system repair option just an installation option.
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Aug 6, 2012
When I first boot up my desktop computer or let is set for any length of time the monitor loads up but the screen keep flashing/blinking kinda like light in it.Usually after 2 minutes or so it stope so I can continue.
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Dec 23, 2011
My computer was working fine a couple days ago and all of a sudden got a terrible Trojan that would spam me with random IE ads. So I ran ad-aware and it got rid of the problem. I went to bed relieved but woke up to my computer in a black screen with just a single cursor "_" flashing. I figured it was a fluke and restarted. same problem.
So I decided to open up the computer and check the SATA drive connections. Everything looked fine but the problem still persisted. I decided that it could just be slot number 1 and moved it to slot 3. The computer would start up and go to desktop but all of my icons disappeared and the computer would just hang if I tried to open any file or go on the internet or any program.
Obviously, it was because the SATA drive was now in a new slot?? I'm not sure. But I put it back into slot 1 and went into the BIOS setup and sure enough, it was a "not detected" for slot 1. The main HDslot.
I tried to reset the BIOS using the jumper method and it still just hangs on black screen with cursor "_" flashing...
Specs:
- windows 7 ultimate edition
- Intel duel core @ 3.2ghz
- 4gb RAM
- Asus P5Q-PRO motherboard
- geforce 8800 GTX graphics card
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