My Aqua-rite display stopped it's digital read-outs including no LED red lights for power and water flow, etc. Because my system was very old- 15+ years, I went ahead and replaced the Main PCB (GLX-PCB-RITE), the PCB Display (GLX-PSB-DSP) and the Transformer (GLX-XFMR). There is still no display. Could it be my rectifiers? Please advise. !!