How to resolve BootMGR missing error

[Ashu21]

Hi,

I am getting BootMGR error while starting my laptop.

I have executed all the Memory Test and Hard disk Test, and all executed successfully.

When rebooting from external CD or Bootable Pen drive, i am getting blank screen.

Can someone please help me resolve the issue.

Thanks in advance..

[Riddle_Decipher]

@Ashu21 If you recently installed an additional hard drive, turn off the computer and remove the drive before using the following steps: (Click here for details)

• Open HP System Recovery:

CAUTION:

Please backup your data before proceeding further:

• Press the F11 key repeatedly while the computer is starting.
• If you have a recovery disc, turn on the PC and insert the first recovery disc into the drive. Use the disc to enter the system recovery.

1. Select Microsoft Startup Repair tool and wait for the repair to find and fix errors. When finished, restart the computer; even if the startup repair tool finds errors but cannot fix them.
2. If the error message persists, open the recovery manager screen as was done in step 1.
3. At the recovery manager screen, press ALT + D.
4. Enter the following text at the command prompt: bootrec /rebuildbcd
5. If bootrec displays "Add installation to boot list?", press y.

After bootrec completes successfully, the computer displays "The operation completed successfully".

1. To close the command prompt, enter the following text: exit
2. At the Recovery Manager screen, select Microsoft Startup Repair tool (again) and wait for startup repair to find and fix errors. When finished, restart the computer.
3. The error should no longer open. If it does, perform a system recovery, making sure to backup important files.

If you removed a hard drive before using these steps, replace the drive. If the error occurs again, make sure the additional hard drive is not set as an active drive. Only the main bootable drive should be set as active.

For more steps, you may also visit a similar HP forums post: Click here & here.

P.S: Welcome to HP Community 😉

Let me know how that pans out,

If you feel I was helpful, simply click on Accept as Solution to help the community grow,

That said, I will have someone follow-up on this to ensure you've been helped,

Just in case you don't get back to us, 

have a good day, ahead.