Titan

I have one problem
after i installed a titan chip in my friend v4 pal ps2, it will booting up
normaly, but no picture, and no music
but it will booting, i seeing the drive
after i switching to psx mode, it work correctly, have picture
and sound

any idea ???

cheers

dark

all wires ok...
if i disconnect 1 wire from bios, i have picture and sound, but no booting...
i installed more than 15 titan, and no problem, just these...
any other idea ???

if possible pls send me install pic for v4...
i check it...
my jumper settings is ok...

dark@k2.jozsef.kando.hu

thx