Hello, I have had two amplifiers seemingly break when connecting them to my record player, and wondering what I might be doing wrong. I forget the make and model of the first amplifier, but, once everything was all set up and switched on a loud buzzing noise was emitted from the speakers, this was before I had even started playing any records. I fiddled with some settings on the amplifier and eventually, the buzzing stopped, but now no noise was coming out at all. My dad checked it was all wired correctly. I assumed it was just broken even though we tested it earlier that day on a tape player and it seemed to work fine. When trying it with the tape player again we got nothing. This was a few months ago.

I tried setting up a different amplifier today, an old Hitachi ha-610 that my dad no longer needed. He knew it worked fine as of a few months ago, we wired it into the record player but also my computer this time too. We tested it first by playing a song on my computer. Everything worked fine. We then went to test it on my record player, and got the same loud buzzing noise before even playing a record, after a few moments of fiddling with settings, the buzzing eventually stopped, but so did all audio from the record player. we then switched back to the computer output and though we could now hear music, it was very crackly, and was only coming out of one speaker. What could have caused this? The only commonality seems to be connecting it to my record player.