Question PC won't boot, USB devices have power (keyboard and bt dongle lights work), but no motherboard lights ?

[pekopekora]

Woke up today and found my pc just not booting at all,
whenever i switch on the psu through its switch, my keyboard lights and bluetooth dongle work but upon further inspection
inside the case, i found that the motherboards led indicators have no power (it should normally be a breathing orange led)

CPU: Ryzen 5 4600g
Mobo: Gigabyte B450M-K
Memory: 16gb Hyperx @3200mhz
Graphics: Gigabyte rx 580 4gb
PSU: Inplay GS450Pro 450w

any thoughts on what the issue could be? im suspecting that it may have been my power supply randomly failing on me as i recently upgraded to an rx 580 from a 750 ti, and since its a 450w
psu, the rx 580 had the white light indicator on its 6 pin connector, i didnt think much of it though as a lot of people has said that 450w should be fine for an rx 580.
will also try troubleshooting later if it may be the motherboard since i have a spare a520m here lying around. thanks

 

[CountMike]

Woke up today and found my pc just not booting at all,
whenever i switch on the psu through its switch, my keyboard lights and bluetooth dongle work but upon further inspection
inside the case, i found that the motherboards led indicators have no power (it should normally be a breathing orange led)

CPU: Ryzen 5 4600g
Mobo: Gigabyte B450M-K
Memory: 16gb Hyperx @3200mhz
Graphics: Gigabyte rx 580 4gb
Psu: Inplay gs450pro 450w psu

any thoughts on what the issue could be? im suspecting that it may have been my power supply randomly failing on me as i recently upgraded to an rx 580 from a 750 ti, and since its a 450w
psu, the rx 580 had the white light indicator on its 6 pin connector, i didnt think much of it though as a lot of people has said that 450w should be fine for an rx 580.
will also try troubleshooting later if it may be the motherboard since i have a spare a520m here lying around. thanks

I would suspect PSU too. Although 450W should be enough, not all PSUs are created equal, some may not actually produce half the rated power.
Have you tried without Rx 580 ?