A couple decades ago, I had a Krell CD-DSP (CD player). Like you, I have a lot of equipment and boxed it up and put it in the garage for a couple years. When I put it back into service, the transport worked (via the digital out) but it wouldn't function as a player. I used it with an external DAC, and later sold it. The guy who bought it was local and dropped by to show me that one of the internal parts that he replaced had rusted. I assume the temperature change, despite being in California, allowed condensation to form on the internals probably causing the malfunction. I would look to a qualified tech for help. My recollection is that Krell doesn't like working on their own equipment unless it is recent vintage or under warranty. I would still call them if I were you and tell them the problem. They may be of some help.
Krell KAV 300i won't Power On?
I have a collection of audio much of which I never use and recently got this out of storage.
I once had trouble turning it on in the past, but noticed that the batteries in the remote were dead. I replaced them, was able to power on the amp with the remote, and everything was fine, sounded great etc.
Now, I have just tried to use the amp (again with new batteries) but whether manually on the amp or with the remote, I can't get the red stand by light or the blue power light to illuminate.
I have checked the fuses in the rear which seem fine and also opened up the top cover where four internal fuses also seem fine.
Would greatly appreciate any advice or ideas whether specific to this Krell integrated amp or generally as to why an amplifier might not power on.
Thank you and best regards,