RCA RTU 7877-B TV repair service available Contact for assistance
RCA RTU 7877-B TV repair service available Contact for assistance
You're questioning if you're in the correct section of the guide. Based on the details you shared, you've already swapped the TCON and Main boards, but the screen remains black with faint lines. Your next move should likely involve checking connections, ensuring proper power supply, and verifying component placement before proceeding further.
Based on my search, it seems TVs are no longer being sold. The price of a new one plus the cost of replacement parts makes repairing unwise.
Do you know whether the backlight is working? If it remains off, your screen will appear extremely dim. You might be able to view the actual image by shining a bright flashlight at the screen from different angles and distances. The backlight is made up of LEDs arranged in strips along with a driver board (plus connecting wires). Considering the size of your TV and the expense of purchasing another identical one, I think it makes sense to fix it. I suggest taking it to a repair shop—especially if you can get a free quote. Good luck!