I picked up a used Koss HH375 receiver at a Goodwill store. It's purpose
is to power some speakers for my computer's sound. Although this is no
high powered amplifier, it does the job, and sounds 100 times better
than those cheap "amplified computer speakers".

But it has a "bug". The power switch is erratic. Sometimes I have to
push it 5 or more times to get it to "latch on". (and the same to shut
it off). Once and awhile, it even turns itself off, when in use. Worse
yet, often when I turn it on, there is no sound. I have to push the
"up/down" volume switches.

My original thought was to just never turn it off, and to put a switch
on the power cord. I soon found this will not work. If I unplug it, it's
OFF the next time I plug it in.

I have not yet opened it up, but plan to do so. But there must be a
problem beyond dirty switch contacts, because of that volume control
issue.

I should mention that this receiver was designed to be used with a
remote control (which I do not have). That tells me that the switch is
INSIDE the circuit, not just a power line toggle switch. And that's
where I tend to get lost......

On top of that, I have not found anything as far as a schematic online.

I'm a guy who has worked on a lot of tube equipment, but this modern
stuff is not my cup of tea.....

Anyone have any idea how this thing works or what to look for???
I'd like to fix it if I can, just because it has very nice sound
quality. Otherwise I'd just replace it with another amp. I did not pay
much for it, so it's no big deal, but I'll give it a shot, if I know a
little more what I am facing!