my preamp wont power up

Any power transformer sound?

There was a problem with the power supplies on some preamps and soured components. They used 2 6h30s in the power supply which not always aged at the same rate. This could affect the sound. So ARC offered an upgrade to replaced the 2 6h30 tubes with a single 5771. I know my CD7 was upgraded this way. I don't believe the Ref 5 had this problem Though.

I still think it is something simple. I would try moving the preamp to another room and use a different power cord. Just to see what happens. If that fails I would call Kal at ARC. If you bought it from a dealer you could have him take a look at it.

Thanks,no transformer sound i can hear.Yes a techy will do it.looking at those other posts, maybe a cap in the power supply.I had changed to a tungsol black plate which i prefer,i wonder if that brought this on.

"08-21-15: Czarivey
Lemon?"

I think you're confusing ARC with BMW.

Zd, So I shall say 'turkey' perhaps :)