Sorry uns97, i must say i join the group of people that think this problem is caused by the modchip or Sony itself.
I have received 2 dead V9 modded with a messiah 1.31, al the other ones are working fine until now.
I have done several installs of all kinds of mods in older version PS2 they work like a charm.
Now all of the sudden allot of people suffer dead V9 and all of the reported problem are exactly the same.....saying that this due to the lack of the installation itself is BS !!
Some of the modchip scene themselfs are shoving this in Sony's ass but for the same price the V9 is to sensitive for what so ever and they do not seem to figure out why???