Help my fix my Arizer Solo please

[HardCelery]

Can someone help me fix my Arizer? When I try top charge it, idle lights up blue then goes off followed by a beep sound as 7 blinks on and off. The beep continues for a bit without lights then it repeats this process.
Tried a new charge already too.
M104 is the model.

 

[exit]

do you have access to a PA?
sounds like your solo is old enough to have PA function, aka pre-pass thru

unscrew solo
remove top cap
pull out PCB + battery
remove battery cover and battery
turn on solo by plugging in PA to charger port
turn it on and let it heat a little while
turn it off by pulling the power
reinsert your battery
try it with the PA again to make sure
if it works, put the battery cover on, reassemble it, enjoy