emulatorII-list

Hi everybody!
It's nice to be a member of this forum!
I've just obtained my first Emulator II. It is model 6028 (2 
floppies, no HD, not "+" model)
And I have the following 3 problems:

1. The sampling input doesn't pass the incoming signal,
but if I gain it as +40 db using internal amp of EII (Sample module - 
gain set)- I can hear the incoming signal very very quiet.
The "Gain" knob makes no difference at all.

2. When I turn my EII on, it tells "Emulator 2 Boot in progress" and 
then it freezes! In order to make EII working, I should try to turn 
it on and then off for several times - then it successfully asks for 
the disk - and seems working ok, except the problem 3:

3. I loaded a presets from the disk, but when I starting to play
them, the sounds became more and more distorted down to the
full silence...

I suspect that the problems 2&3 can be due to the bad internal power 
supply. Am I right here or there can me anything else?

It will be great, if someone can help me with it. Any advice will be 
kindly appreciated! Thank you very much!

Grigory