All current graphics cards should support vanilla VGA mode so you can get into the BIOS, and such like installing drivers, etc. If your monitor does not show anything, and you don't have an on-board video adapter, then there is some other problem happening.
rubberman
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So, assuming that you are running Windows, boot Windows into Safe Mode, install the appropriate driver, set the lowest screen resolution, restart in normal mode, then set the optimal screen resolution.
JorgeM
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