Hey folks - new member to the forum here and a new owner of a used HRDx (Texas Red, from a few years ago). Owned it for just a couple of weeks. The amp sounds fantastic, but it developed a problem pretty quickly where I turn it on (i.e. set it on Standby, turn Power on, let it warm up for a minute, then flip Standby to ON) and no sound at all - no hiss.. nothing. The tubes are glowing and everything seems fine, but silence. Waiting for another few minutes leaving it on and it just remains silent. But then if I go through the power up sequence a couple more times, it eventually comes to life and works fine thereafter. And if I turn it off at that point, and then power it back up it's always fine too. The problem only ever happens after the amp has been cold. Sound like anything familiar?