Radio is in excellent condition, ran and checked power wires with good continuity through the system, 12.5 volts. When you turn the power knob on, nothing happens. I tried shorting out the faceplate thinking that might be the problem, however, this did not solve the problem. I saw this has an internal battery for memory preset retention, which the manual said has to take up to 36 hours for it to charge. The radio has not been connected to power for quite awhile, does this have anything to do with the problem? Does this internal battery have anything to do with powering on? Any advice and solutions will be greatly appreciated. Thank you.

Radio Communications - Midland - 79-290 120-Channels Base CB Radio