Just turn up the brightness button. I just had the same problem :)

On Mon, 2005-02-28 at 23:59 +0000, Graham J Lee wrote:
> Hi,
> 
> I installed 1.6 from CD (the CD I happened to have lying around :-) 
> onto a Wallstreet.  This all worked, I set the load-base and real-base 
> in OF, and boot from the hard drive (boot ide0/disk@0:0).  It gets (as 
> far as I can tell) all the way through, but before it reaches the 
> login: prompt the display becomes extremely dark.  So dark as to be 
> unusable; the text is black on slightly-less-than-black.  I can only 
> just see that the text says something along the lines of:
> 
> wd0[a-p] ddb halt reboot
> 
> The brightness/contrast buttons on the 'book are of no use; how can I 
> [1]change the brightness [2] proceed from here?  The console used for 
> installation (the standard OF console) is clear and bright, and indeed 
> when I return to OF this is still the case.
> 
> Thanks,
> 
> Graham.
>