May be faulty electrolytic capacitors.Hi I have two rb750's the problem i am facing is that when light goes off and come again my rb don't work(means at client end hotspot page even don't come, server not found error comes), i am not using any ups, generator or any backup, but if i restart rb it work perfect, i can't be at rb to restart always when light come again, any one can help? Facing same problem with both RBs.