Haier color TV HP2988N image is not clear, how to solve it?

Haier color TV HP2988N image is not clear, how to solve it? 1. Accelerator voltage is insufficient-increase the accelerator voltage and adjust the accelerator potentiometer on the line output transformer. 2. Leakage of CRT bracket-After half a day of power failure, pull out the CRT bracket (with video amplifier), soak it in industrial alcohol, scrape off the burnt part with a small sharp knife, clamp the socket in the small tube bracket, and then blow it to a slight heat with a hair dryer. 3. There are two potentiometers on the line output transformer, the acceleration potentiometer below and the focusing potentiometer above. 4. Note —— When adjusting the accelerator voltage and focusing voltage, power must be applied for 15 minutes, and the foot pad is dry. Work with one hand. Don't touch other objects, look in the mirror and adjust until you are satisfied.