IC801 and IC802 are the convergence IC's that need to be removed and changed. You can purchase the (2) STK392-570's Here:
You will also need to order (2) 5 amp PICO fuses, and possibly some convergence resistors. The Resistors I am talking about are the greyish blue ones in front of the Convergence IC's - they may have the value printed on them, but if not you can look up the value by component location in your service manual. All the parts you might need can be purchased through the link I posted..
You will also need to get some Heat transfer paste and solder wick from radio shack.
Remove the center board (the one that has the large Heatsinke and the convergence IC's - all the plugs are already marked according to the sockets, so there is no worries there- unhook the jumper connectors that hook on either side of the center board - you should be able to pull the center board out now, once you remove all the screws holding it to the plastic frame.
Remove the 2 convergence IC's - you will need to use a solder sucker or solder wick to desolder them, you may have to pry the convergence IC a bit to make it release from the heatsink.
Look for and check the blue/grey Resistors in front of the IC's - make sure that they are all within specifications (marked on resistor) aka: 3.9 ohm..
Now, you will need to check your service manual and find the 2 Pico Fuses that power the convergence IC's - check them , more than likely one or both blew when the convergence ICs failed.
Once you change out the components, you will need to go into the convergence menu and perform a coarse convergence...You should be set from there!
If you need any more help, please let me know!