Intermittent green and pink screen with noise

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Feb 5, 2020
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philippines
I have 37" LCD TV, Dick Smith GE6804 (same as AWA MHDV3720). It's been a great tv for several years. I use it as a computer monitor.
Starting few months ago, I am experiencing very strange issue with my tv,

It always starts with a distinct "click" or "clunk" noise then screen is covered with either green or pink. So if I disconnect computer then instead of normal black screen, I get solid green or pink screen. Sometimes I hear rattling noise inside tv, then sometimes no noise and quite. But lately I get more noise then quite.
Computer connected:
1580914662990.png

Computer disconnected: green or pink
1580914579010.png

BTW I get green/pink screen every few days then sometimes 2-4 times a day. Sometimes within few hrs between green/pink, then perfect for few days, etc....

So at first I unplugged power cord, and plug back in. It resets to normal multi color screen everytime. Sometimes I press power button at bottom of tv, and sometimes I have to unplug then plug in power cord. (This is why I can not take to repair shop cus when I plug in tv at repair shop, no problems)
Also when I plug back in tv, rattling noise inside tv stops.

There must be something wrong with tv but I can live with unplug then plug back in as long as I know all it takes is reset.

I opened back panel and checked all capacitors, none are bulged, and all connections are tight.

So the question is what is "rattling" inside tv when screen is green/pink?
Anyone experienced the same? what was the solution?
What is interesting is that green/pink screen is not permanent. After "reset" (hard or soft), always back to normal colors.
 
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