charger is 2 years old, worked fine last night at practice. this morning went to store charge lipos, after one successful store charge today now the menu buttons do not respond. pushed hard, nothing. disconnected power let it sit, nothing. anyone know how to fix or reset this? thank you!

My Hyperion HP-EOS720INET3-ADEU 720i AC/DC 20A Charger/Balancer was used 10 times and died. Hyperion told me the electronics failed from dust and contaminates and prolonged use. Never again