sorry to say this , my ps2 also v8 39006 gh-22 console & there MI no fix for this ps2 version . i'm also try to mod ps2 v8 but end up fail & install crystall chip .I try to install this chip to V7 & it's work fine.for you in for if you do game backup use dvd+r & burn with 4x & use booktype dvd-r.My ps2 V8 can't play backup game that burn using dvd-r.
i hope this will help you if you try to install crystall chip you can ask me for info good luck.
oh one more before i mod my ps2 with cc my ps2 mod with old bluechip that made just for ps2 V8
Ps2 with crystal chip 2.0 pro