Haier 75UF5550B Service Manual

Refer to Chapter 6, Section 6-3 of the service manual for detailed instructions on setting up your remote control.

The front panel controls are described in Chapter 6, Section 6-1 of the service manual.

First, verify if the television is properly plugged in and supplied with power. Check if electricity is available. If the issue persists, try restarting the television or changing the signal input to TV input by pressing the SOURCE button.

To troubleshoot poor sound, verify that the sound system is set correctly. Refer to the user manual for instructions on how to adjust the sound settings.

First, verify if the speakers are broken. If the speakers are not broken, check if the main board has the right input according to the source you are connecting (TV/COMPONENT/AV/VGA/HDMI, etc.). Then, check the corresponding audio input circuit. If the issue persists, verify if UA1 has the right output and power. If UA1 is functioning correctly, check if CNA5 input is right. If all else fails, you may need to change the mainboard.

If the speakers are not broken, check if the main board has the right input according to the source you are connecting (TV/COMPONENT/AV/VGA/HDMI, etc.). Then, check the corresponding audio input circuit. If the issue persists, verify if UA1 has the right output and power. If UA1 is functioning correctly, check if CNA5 input is right. If all else fails, you may need to change the mainboard.

If some channels are showing in black and white, first verify if the same problem exists in other channels. If the issue persists, check the picture and sound system of the affected channel. If the sound system is not set correctly, change the channel to the right sound system (PAL-BG SECAM/L) and refer to the relative instructions in the manual for color adjustment. If the problem still persists, update the software and reboot the TV, or consider changing the mainboard.

If updating the software and rebooting the TV does not solve the issue, you may need to change the mainboard. This is a more advanced troubleshooting step and may require professional assistance.

A horizontal gray line on the screen indicates a panel failure, which could be due to misalignment between the TCP and LCD, something electric entering the panel, or an awful environment causing ACF bonding short.

A vertical color line that appears light or dark forever on the screen could be due to a panel failure, specifically related to the TCP cracking or cracking of the panel.