messiah installations problems

[CRIS]

I install a messiah mod and i have the follow result.
The ps2 starts-up normaly and some times can load a back-up game but after it hung-up.After i press reset, NO picture NO sound NO eject.Even if i turn off and after turn on the ps2, NO picture NO sound NO eject.After 3-4 hours if i turn it on agean it starts normaly and after bla bla bla ......the same NO picture NO sound NO eject.
The installation looks perfect i check it lots of time.
The chip its messiah finall.
My ps2 pal SCPH-3004 R.Using internets imformations i end up that it is V5 and i install the chip with the V5 Installation Instructions.
Can somebody tall me what is roeng???
Please help.