Accidentally disabled video card in the BIOS, now just a black screen

I am writing to my brother-in-law because he can't see anything out of his monitor.  Its screen is completely black, even at startup.  He said that this was due, after having entered the BIOS and under the framework to monitor/video card PCIe to Onboard.  It can't change because its screen is now completely black so he can't see what she does.  Not one thing is displayed, not even the screen blue intro HP before loading Windows.  The computer does not seem to work, but it's just, that there is no video input.  Does anyone have a recommendation?  Here are a few things we considered:

(1) temporarily add a new video in the PCI slot card, hook the monitor up and allows to change the setting back.

(2) remove the battery of the BIOS for 5-10 minutes, and then move back in.  Would this reset the BIOS to its original settings?

(3) clean sweep with factory recovery CDs.  Does anyone know if the recovery CD will also retrieve the settings of the original BIOS?

The computer is a HP Pavilion m9000t.  Any input would be greatly appreciated...

Hello

Remove the RTC battery for more than five minutes (BIOS) clears all custom (including time & date) the BIOS settings and return all the default settings.

Kind regards

ERICO

Tags: HP Desktops

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