I have an AOC Spectrum 4V 13" Monitor. Since one year it has been blacking out (turned off the display) time to time. It has been "turned on" with a hit. Few weeks ago the problem had getting worse. The black out problem has been more common and the "hit" to turned it on should be stronger (A strong hit in the upper or bottom front of the monitor is the best). Sometimes the displays turned more green than normal. When it is hit some "click" sound is listened before it turned on (when it turned on).
Some times when it black out the power leds blinking some times, sometimes they are normal and response to (Func, + and -) buttons. And in other times leds are die (turned off). I open the monitor and looked out for cold solders joins or bad capacitors (with the eye, for example capacitor with its contains out (dielectric)) I found some bad solder joints in the NECK BOARD but Multimeter told me there was continuity there. I resoldered them to be sure and to prevent more problems. After that, leds and front bottoms work property. But only for a while. The problem continue. Some night it works and the other night it do not display anything without any change, any move or anythig more than push carefully the on button.
I realize that if you give a little hit in the NECK BOARD display sometimes is turned on and if it is turned on it become more green. After I have resoldered many suspected joints, I try to found the problem part with little hits in the NECK BOARD components. But it doesn't seems to work.
***Hitting the board in many parts give the same result. If I take it with my hand an move it a little, nothings happens. But if I hit it, displays is changed as I said.
***=BFIs it normal?
I realize that electrolytic capacitors NECK BOARD areas have a little more sensibility to a hit.
***So I one to ask you if you thing I should change all the electrolytic capacitors
The question I have after read quickly the monitor repair guide...
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.=2E.with the knowledge that the "click" like sound is maybe the flyback turning on sound and with the behavior of the neck board I do not know exactly what to do.
Thanks very much for any help.
Regards.