Freezing after bios installation

[lolof]

Without a new chip with the dreamcast bios your dreamcast will not boot.
At the moment, you have no bios in your dreamcast, it means no possibility to boot nor to programme a new bios chip from your dreamcast. You have to solder a new chip with pre programmed bios in your dreamcast. It is the only way to get your dreamcast to boot again.
You could also take this one out and ask someone to programme it for you and solder it back to your dc.
It is crazy to have removed the original one.