I have read the section how to repair convergence problem of the Mitsubishi model WS-55511. I found a 15AMP pico fuse open. I need to replace a fuse and convergence IC, I ordered and received all the parts (IC from SANYO). My problem is the ribbon cables, How can I safely remove thoses cable so that I can take the board out and replace the IC. I did not see a latch or a locking mechanism that I can release to pull the cables out from their sockets. Thank you very much, your opinion is greatly appreciated.