Alesis Andromeda A6

My A6 takes ages to get in tune on startup I have to go through the
auto tune 4 ot 5 times to get the top notes in tune. Tt sounds ok up
to C5 then it sounds like the oscilators are beating. Also after about
an hr I have to hit the auto tune button again although the display
says it's ok. 
Anyone had any issues with their A6 drifting or slow startup. 


Bob