Model # 32A43 brightness problem

Check for about 100 to 500 volts on G2 pin (screen voltage) when screen control is adjusted,if less than 200 volts,remove the g2 capacitor(from G2 to ground) on crt board,if screen regains brightness,then replace capacitor,if ok ,troubleshoot the ABL circuit,look for an open or changed valued resistor,also check your heater voltage.Good luck.Cheers.