To change the input source on the Haier LE50D3505 TV, press the INPUT button on the front panel.

To turn on the TV, press the POWER button on the remote control and ensure it is aimed towards the remote sensor on the TV.

The USB Shortcut button on the remote control allows you to quickly access USB-connected devices and their content.

You can adjust the sound settings by modifying the values of Sound Mode, Volume Curve, Audio Output, and True Volume for different sources. These settings can be found in the Sound section of the manual.

The panel settings you can adjust include LVDS Bit Mode, LVDS MAP, LVDS ODD/Even, Backlight, 6MX0 LVDS Map, 6MX0 Channel, 6MX0 Mirror, 6MX0 Demo, and 6MX0 Update. These settings can be found in the Panel Setting section of the manual.

First, verify if the television is properly plugged in and supplied with power. Ensure that electricity is available. If the issue persists, check the signal input by pressing the SOURCE button to change to TV input and restart the television if the power supply was interrupted.

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. If the problem continues, try switching to another channel to see if the issue is specific to the current channel.

The TPA3110D2PWPR (UA1) is the Audio Amplifier in the Haier LE50D3505. It is responsible for amplifying the audio signals to drive the speakers, ensuring clear and powerful sound output.

To fix the issue of no color on some channel programs, first check if the problem exists on other channels. If it does not, check the picture and sound system of the affected channel. If the sound system is incorrect, change it to the right sound system (PAL-BG SECAM/L) and follow the instructions in the manual for color adjustment. If the problem continues, update the software, reboot the device, or consider changing the mainboard.

A 'Horizontal bar' on the screen indicates a TCP failure or 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 or TCP lead cracking.