Take off the back cover of the TV. Be careful around the red wire that suction cups to the top of the CRT - it carries high voltage! On the circuit board, you will see where the power wire connects to the board. You should be able to pull the board out to get to this area. Also, the board can be completely removed by disconnecting a few connectors and gently pulling the board off that connects to the back of the CRT. When disconnecting the high voltage wire from the CRT, there are many resources on the web that discuss the proper way to do that.
The diodes are near where the power wire is soldered to the board. You will see a fuse (which needs to be replaced - just pry it out and drop in a new one - Radio Shack sells these). Then if you go toward the back of the case, you will see some other electronics and then four diodes. They were all black in the one I worked on. And the number on them is in my original post, I don't remember it right now. Desolder one at a time noting its orientation - diodes must go back the same way, and check each one. I used a multimeter that had a diode check function.
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Take off the back cover of the TV. Be careful around the red wire that suction cups to the top of the CRT - it carries high voltage! On the circuit board, you will see where the power wire connects to the board. You should be able to pull the board out to get to this area. Also, the board can be completely removed by disconnecting a few connectors and gently pulling the board off that connects to the back of the CRT. When disconnecting the high voltage wire from the CRT, there are many resources on the web that discuss the proper way to do that.
The diodes are near where the power wire is soldered to the board. You will see a fuse (which needs to be replaced - just pry it out and drop in a new one - Radio Shack sells these). Then if you go toward the back of the case, you will see some other electronics and then four diodes. They were all black in the one I worked on. And the number on them is in my original post, I don't remember it right now. Desolder one at a time noting its orientation - diodes must go back the same way, and check each one. I used a multimeter that had a diode check function.
Good luck.