what causes a blank screen on computor with a

August 8, 2011 at 17:06:28
Specs: Windows 7
when i turn on computor it goes off and screen blank with a white dash at top left

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#1
August 9, 2011 at 03:35:59
To isolate the problem, try another monitor.

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#2
August 9, 2011 at 09:41:02
this problem comes due to either MBR or boot sector or partition table corruption .
I assume your MBR is not feeling good and need a doctor.

Boot from the CD and run fixmbr and fixboot from recovery console.
For more info on how you can run fixmbr and fixboot , refer below lines (source -I think from microsoft docs)

FIXBOOT

fixboot drive name:

Use this command to write the new Windows boot sector code on the system partition. In the command syntax, drive name is the drive letter where the boot sector will be written. This command fixes damage in the Windows boot sector. This command overrides the default setting, which writes to the system boot partition. The fixboot command is supported only on x86-based computers.

FIXMBR

fixmbr device name

Use this command to repair the MBR of the boot partition. In the command syntax, device name is an optional device name that specifies the device that requires a new MBR. Use this command if a virus has damaged the MBR and Windows cannot start.

Warning This command can damage your partition tables if a virus is present or if a hardware problem exists. If you use this command, you may create inaccessible partitions. We recommend that you run antivirus software before you use this command.

You can obtain the device name from the output of the map command. If you do not specify a device name, the MBR of the boot device is repaired, for example:
fixmbr \device\harddisk2
If the fixmbr command detects an invalid or non-standard partition table signature, fixmbr command prompts you for permission before it rewrites the MBR. The fixmbr command is supported only on x86-based computers.

..
SubhashChy
Become a Windows Geek


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