Hi all, I was just given a pair of what I believe to be Penta II's. I am having a bit of trouble with them though, in one, the display is not working correctly, everything stays lit up all the time, so I took out the display boards. But, the bigger issue here is that there seems to be hissing and popping, in one speaker only. The hissing is constant and every now and then the speaker pops for no reason. Also, when you turn the speaker off, the hissing continues and slowly goes away. What could the problems be and will it be a hard fix. Also, where can I find a new display? Is it possible to upgrade the display to the newer green version as was added to the Penta 3?
Thanks for your help!