Hi, I have a TV board for a cheap little LED TV. The AC/DC adapter is built onto the board. I have successfully swapped it into another TV that has a power supply with 12v rails (mainly using it for CCFL backlight power). However, I would like to power the new board with the other power supply, and I have tested 12v just about everywhere on the "COLD" side of the circuit so it seems plausible. Trouble is, I can't seem to find where the 12v comes in. I'm not getting anything from the leads on the "COLD" side of the transformer. What am I missing?
It's also probably worth mentioning, I wouldn't care so much except that the 24v (CCFL backlight power) rails from my separate TV PSU won't turn on unless the 12v rails are loaded. The 12v rails are also always on. There's also an "enable" pin on the PSU that I've gotten to work nicely with my new TV board so the whole thing can turn on with the remote control from the new TV board. I also rewired the LVDS cable and found a jumper to switch one pin from 5v to 12v panel power. All is working great, I've never done anything quite on this scale so you can understand that I want to finish this last puzzle piece and assemble things without wiring up a dummy load and the 120v power cords together!