This is a power supply from a Sony SLV-R5UC. These power supplies were WELL KNOWN to OVERHEAT and fail.
It was working for some time, but now refuses to supply power. I can't remember if this was rebuilt, as there is some heat damage marks to the circuit board. It will need diagnosis and most likely new capacitors to function properly. Or use this for parts to rebuild another assembly.
Selling as-is, not working.