I have diffirent models of Playstation 2. One of them is 750004 and modchip. I use BDM Assault and Also fmcb1953. But when i boot ps2 sometimes mass is appeared sometime is not in wle. Also the same problem with opl, popstarter, Neutrino
This means that your USB disk is not fully compatible with PS2 homebrew drivers.
This issue happens especially on SCPH-750XX or higher revisions probably because of giving less power (W).
