this CM7000 digital TV to analogue NTSC converter set top box quit working, and the red pilot light never changed color.
In the USA and that corona virus has us mostly stuck at home. So, looking for something to do, saw this dead converter box, and looked on-line for fixes others successfully did. Said that replacing all the leaded electrolytic caps on the "logic" board (vs the power supply board). The box came alive after I did the caps associated with switching DC-DC converter circuits (the ones that take 5V and make 3.3V and another to 1.2V, in the picture below marked "replaced but not necessary", was for me!). As I didn't have 33μF 35V caps on hand, I used 47μF at 50V caps. These caps filter out the switching waveform, so the caps being bigger is of little concern.
Found this "answer" at another forum
https://www.avsforum.com/forum/27-re...l#post59384596
from where I plagiarized the below picture.
