PC won't boot -- no beep code, but power and HDD LEDs remain lit

[JamesW6179]

Hello,

I'm thinking that it's my PSU but I'm not sure. What is the most likely issue this is caused by?

 

[das_stig]

Good bet it is PSU, old age or just a cheap nasty psu that do die after a few months.

 

[popatim]

Test the PSU with a multimeter or voltmeter.
My best guess would be the motherboard but i would test the first regardless.

 

[VongaiziusFashion Cathy]

Reseat the cmos pin and RAM