Most likely issue is damage to the board connector/cable.
A build-up of conductive fruit-juice across traces or the edge connector could cause an issue. Use a magnifier and alcohol-soaked swab to clean what you can find, and dry thoroughly.
Damage to the board connector/cable, such as a broken trace, could also be an issue. That damage could be caused by electrolytic corrosion from the juice and power supply. If a trace is damaged, it will need to be bridged with car defroster silver repair paint or solder. You may need a continuity detector to find a break.