capacitor

I have a Bendix/King KX99 that will not remember the memory and needs the super capacitor replaced. Additionally, sometimes the LCD is half dimmed cutoff halfway where top is missing and lower is there. I'd like to replace the memory capacitor, can you provide me guidance as I don't have the...

I have a Radio Shack Pro-2006 still in excellent condition, but I now have an AC power hum, especially on AM channels. My guess is that a power supply capacitor failed after all these years. Has anyone else come upon this and, if so, have any ideas regarding which capacitor(s) or other...