I think I have the same problem. I flashed the BIOS with 2 different versions but still no success. I will describe BIOS flashing procedure in case you want to try it and maybe have success :-)
I assume you run WinXP or a newer one, so prepare an empty Flash drive. Then download HP Disk Drive (just google for SP27608-2.1.8.exe), with this you can create an MS-DOS boot disk. You will also need MS-DOS files, they can be found on http://www.hiren.info/pages/bootablecd/
Using this utility create boot disk. Then, in the autoexec.bat file put commands, which will execute the rom flashing, you should put the ROM flashing utility and ROM image on the boot disk as well. Please note, that ROM image file name should be 8 characters long, otherway you will get a "can't read file" error. I personally downloaded the utility and the ROM file from ASUS support site.
Please post your results, hope you'll have success. In case you'll need further help please don't hesitate to ask.