I have a C128 thats my first commodore computer and I am trying to revive it. after pulling all the chips and reseating them, the machine displays some black and white checkers then boots into the assembly monitor. I have replaced the 318018-02 chip (as per a troubleshooting guide) and it did not solve the problem. I could not find a solution so I am hoping this forum can help me. I've also pulled the other ROM chips and with u32 and u33 removed I get the same result so I feel that the problem may be that they aren't getting power or have bad sockets. The power supply has been tested and is functional.