I am using DSS Version: 5.0.DB49000000.3278, I have set Disable value for "POST Error Messages" in BIOS, DSS is not booting now. Not display any kind of message, just blank screen.
Sorry to hear about your trouble. With out knowing more about what precipitated this issue my best guess is that you are having hardware troubles that are not related to DSS.
I would suggest testing the hardware. I good first step though is to be able to get into the BIOS. Once you can get into the bios if you have a cd rom try booting from a cd with something like http://www.ultimatebootcd.com that will give you tools to test your system further. If you use http://www.ultimatebootcd.com be careful some of the utilities for hard drive testing and portioning can cause you to loose data.
1. Download Atlanta2 (b4562) from the link above;
2. Burn Atlanta2 on CD, pendrive, EDC, PQI USB DOM;
3. Put media with Atlanta2 to machine;
4. Restart version (b3xxx)
5. Boot from Atlanta2 and run "Software Installer";
6. Install Atlanta2 on b3xxx media (Configuration from b3xxx should be automatically moved to Atlanta2);
7. When installer finish, restart machine and remove Atlanta2 media, leave old-version where should be now Atlanta2 with old configuration;
8. Boot Atlanta2.
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All the best,