I have this monochromatic chinese television largely manufactured in the past decade, marketed under several brands (Coby, Curtis, Precision, etc). This one in particular have a external AC DC converter of 1.6A and 12v and AV out. His cover is like this one but silver.
In this photo as you can see, it shows several horizontal black lines along the image vertically expanded. I already opened it to clean (had small cockroaches living in with his feces). This photo was taken while plugged in with a alternative smaller and lighter ac dc adapter (1.5 a 12v). The original power adapter seems to be faulty, because in addition of this lines the screen becomes unstable, as if closing.
I wonder if someone could give me a answer or clue about this problem. Thanks.