I too had the same problem where my HT30744 TV would lose its color. My mom's HT32744 would have the same problem too. If I gave the cabinet a good hit it would mostly fix the color, but it could also make the picture go fuzzy too, a clear sign of just a loose connection somewhere. So after my wife telling me she was sick of this almost 2 year problem and she was going to buy a new TV on the weekend, I figured I had nothing to lose. So I took the rear cabinet off, unseated the card mounted on the picture tube, applied a little dielectric grease on the connector on the card and reseated the card, removed, re-greased and reattached the card. I have had no problem with either my or mom's which I did the same to since! This is an easy fix that anyone can do. The hardest part is moving the TV and reassembling the rear cabinet. Do not pull the cabinet back out more than you have to, to ease the reassembly of it.
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Green retrace lines could me two things, the green gun in the CRT is shorting out and that is the picture tube, and it is not worth fixing. Another thing that it could be is a bad neck board and the green driver transistor is shorting, but that would be green all the time, I would say it is the picture tube, and buy a new TV.
If picture and sound is ok, and there is no colour, your push have sometimes made its system changed. I don't know from where you are, and to which country you belongs. Anyway I'll give you one solution.
Your Sanyo Tv may have multisystem compactable. There are mainly three systems in transmision of TV signals, called PAL [Phase Alternating Line], SECAM [Sequential colour and mamory] and NTSC [National Telivision System Committee]. Most of the europian countries have transmitters with SECAM and NTSC. I belongs to India, and here we have PAL BG system.
If the system has changed in the tv, the picture will not have chroma information, ie ,colour information, and black and white picture will be the result. You just do one thing. Just get into the Menu of your TV, according to its documantaion that you have, and go to the system menu, and make it "AUTO". This will solve your problem. Ok.
It needs repair. If the line is vertical, then something is damaged on its horizontal circuit section on the mainboard. If the line is horizontal, the vertical circuit section is damaged. have it repaired to a qualified service center or person! avoid switching it to avoid further damage on other parts!
the thing which you have seen is resistance not the capacitor.
whenever that goes hot or arcing it is due to heavy short ckt in tv.
as you are not much aware of tv technology please caall skilled person to do it for you.
please now do not start again unless it is repaired. otherwise it may be problematic.
This 30" flat screen TV set may have a problem in the high voltage circuit of the TV set. You may be able to adjust this by taking off the back of the TV set. Look for the block where the large red wire runs up to the top of the picture tube. On this block will be two controls. one will say screen and one will say focus. Try and slowly turn the control that says screen or S on it clockwise and see if you can make the picture brighter. Turn up the control till you just start to see faint lines in the picture, then back the control down till the lines go away. If the picture does not come up when you turn this up, and all you get is a blank screen, you will need to have this set repaired by a qualified repair person. Good Luck
if tv have black screen,increse screen control to see vert ic is defective,and if screen is white with lots of line acrose ,you can find open resister,on pic tube board,or in main board near transformer.