2012 Honda Fit radio no sound after several jump starts???? HELP

2012 Honda Fit, base model. 79k miles. Deceased Uncles car. Battery was dead. Jumped and radio asked for code. Found it on sticker in glove box. Radio was working fine. Bringing car home 1.5 hours away we had to jump it 3 times total at various stops. Picking it up, PennDot for title work, Lancaster parking garage, for a shopping stop. One start attempt in the parking garage after some highway driving the car trying to start would not, whole electric system (all lights) would go off & on between motor failed start attempts before jumping. After this jump unit turns on, but no sound. All buttons work. (holding down 1&6 then power on goes into diag mode, one preset tests all buttons)(similar to procedure to get radio SN when unit asking for an anti-theft code). In FM mode the preset #s don't change anything, stays on same station, with no sound. Will not seek to another station, usually no volume number display change. CD thinks it plays, counts, no sound output. Tried aux input, no sound. Tried removing both radio fuses, no change, didn't even ask for code. Disconnected battery, unit asks for code, then no sound again. Anything I can do in DIAG mode?

[@JnJShiffler]

UPDATE: found original manual and radio code at uncles house. Will try to re-install this radio and put the OG code in and see what happens. The code on the sticker on the side of the glove box seemed to work at first. Have doubts.

[@EVFUTURES]

youtube search this seems like same issue. Honda Jazz (Fit) Mk1 (2002-2008) - Radio Repair .