Hi! This is kind of stupid question. But anyone can confirm? Because I tried install M2 1.31 on a 30001R v5. Some strange things happened. First can't load disc. after reset black screen. Then power off and power on again. now bios reset (just like when u buy a brand new PS2. Need to set clock). But good luck! After remove the chip it work again. I don't know if I got a bad chip or not. But I pretty sure it is not my problem. Because I had installed about 100 PS2s. But this is my first time install a M2 1.31 on a v5. thanks.