First thing is check the fuses if f602 checks open then I would test the horizontal output transistor to make sure it's not shorted if it is the fly back maybe tost. I don't know the chassis that set uses but sounds like it's similar to mine. Here is the service manual for this manual may not help but here it is
https://drive.google.com/file/d/1Usb...w?usp=drivesdk if the link bothers any I will remove it.