What kind (And what brand) of disc did you burn your game onto?
Yea i also get a black screen after all the colors flash when trying to play beatmania IIDX 9th (JP), whats up with that! i patched it with the esr patcher before i burnt it and all that but it STILL doesn't work.
You have managed to run other ESR-patched discs before, I presume?
You should use high-quality DVD-R discs (Like Verbatim DataLife Plus with SUPER AZO DVD-R discs), and nothing else (Especially if you have a SCPH-3x0xx PS2).
Unmodified SCPH-77006 with SM 3.6
SCPH-39006 with M-chip modchip, SCPH-10281 NA and refurb Seagate 80GB HDD
SCPH-10000 v1.00 with SCPH-10190 PCMCIA NA and SCPH-20400 HDD unit