Sony str d590 receiver Playing a CD suddenly sound became very distorted and crackled. Is the same when trying to play turntable, mini disc or tuner. Should I buy a new amp?

SOURCE: Sony STR D590 Receiver

Hi there, it would appear that you have a overheating problem and the amp is shutting down. If you have added extra speakers, the impedance may be to low. Try a fan blowing into the amp. But first make sure you have not got incorrect speaker impedances

SOURCE: Str-D590

I tried to use 6ohm speakers on my str-590. They worked for a while then everything went blank. Had power light but nothing worked. I thought I blew the amp because the speakers worked in another amp. I put 8ohm speakers and it came back to life.

SOURCE: need fm wire antenna and am loop antenna for stereo receiver

Could be bought at Radio shack, not the original Sony model but an aftermarket that will do the chore.

SOURCE: I have a Jamo AVR-693

This problem is from the main board, if you try to remove the cover of your unit you will see the main board try to check the solder parts of the pcb. for sure you will see loosed solder or cold solder specially the filter capacitor and the power transistor. If you see this loosed solder try to resolder it but be sure to unplug your unit before opening the cover. before replacing the amp. lets make some basic trouble shooting who knows you might fix it. Feel free to send feed back best regards.