It is never that simple. The troubleshooting guide lists off many components for the loss of vertical deflection:
[FONT=Arial,Bold][FONT=Arial,Bold]R303, D603, IC U601, Z602, C615, D301, D302.
The problem could be any of these components or none of them, since the troubleshooting guide expects you to test the circuits. The troubleshooting guide does list these in the most likely order that they fail, but in my experience the IC is the weak point.[/FONT][/FONT]