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I accidentally updated my bios and can't get windows to boot. All I get is a solid dash in the upper left corner and Can't do anything but manually power down.. How can I get the default bios back

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Sounds like you may have installed the wrong bios. Did you keep a backup copy of the old 1. You should have been prompted to save a copy.
Second thing is to report exactly what was said in an error message..."something/something" really does not cut it.
Lastly it maybe that your mobo just fried itself.One should not just go to doing a bios flash unless absolutely neccesary.
You might try to restart and enter the bios again and click on the install default tab and see if it will restore the default settings. You may have to reset the date/time settings. then save and exit. If the cpu fan does not remain running shut down immediately and try placing a house fan to blowing directly into the pc and try to reboot again. If the cpu fan shuts down again then you probably blew the mobo

Posted on Sep 03, 2009

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Posted on Jan 02, 2017

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It wont boot, goes to black screen with whit blinking dash


Yes, this sounds like the traditional black screen issue, but it's different! This machine is a Dell Dimension 3000 with XP. System won't boot. After Blue Dell BIOS splash screen with F2 & F12 options, it just goes black. There will ultimately be a white cursor in the upper left hand corner. I can edit BIOS with F2, I can get in to the boot menu with F12, but I can't do anything after that. I can even get in to the Safe Mode menu (F8), but it never boots.

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Ensure that there are no periferals plugged in, USB, Lan etc and take any disk out of the CD ROB drawer then try to boot again.
If it still doesn't work, you may have a hardware conflict and will need to press the F2 or whichever key for the BIOS menu and check that it is set up with Hard drive as first boot device, then try again.
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Check you do not have a disc in the CD drive or a USB drive connected.

Check the BIOS has the boot order correct, select the hard drive as the first drive to boot from.

If that does not fix it you will need the OS CD and change the boot options to boot from CD first, and try to recover the data.

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Initial boot


Go into the bios and make sure it is not set to boot from a device that has no information eg. empty cd rom drive.

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Black Screen with Blinking dash on upper left corner


It sound like you are on the right track. It seem so be a bios conflict. I had a motherboard that if set to boot form usb it would not look for any other device it the usb was not available. Double check your bios setting very carefully. It's easy to miss some something. If you have a "CMOS clear" option in your bios try that next. Can't hurt to start fresh. If that doesn't work let me know and I brainstrorm some more.

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Black screen and in the upper left corner there is a cursor theat is blinking ... and teat is all


It sounds like a problem loading the operating system. Try booting from an installation CD to see if anything comes up... if it loads from the CD, there could be a problem with your hard drive.
When it turns on, try entering the BIOS by pressing the correct key (usually DEL, F10, F12, or F2) Make sure that the boot device is set to your hard drive. If you do this and it loads with an error saying 'insert boot media' or 'boot device failed' you'll have to either try fixing your boot sector (which can get tricky, but I'll walk you through it if you really want to attempt it) or a much easier fix, reinstall the operating system.

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