Pc doesn't boot / sleep / shut down

Off late i am having issues with my pc, it does not shut down (restart even if shut down from windows), does not go to sleep, and if i power off the psu, it will not boot up again unless cmos is reset.

Mobob: asus m5a88-m
Cpu : phenom ii x2 b560
Ram : corsair vengeance 16gb ddr3
Psu corsair cx430 ( 1 year old)

Any idea what should i be checking to narrow down

Recently added pci express card for port expansion ( usb 3.0 + usb c type) in pci-e 1x slot, that takes power from sata power cable from psu.

The pc will shut down if power button is kept pressed for 2 3 seconds.
I removed the pci card and shutdown notmally from winndows, and it remains shut down. Restarted it and put on sleep, it won't wake up from sleep.

Reinstalled the pci e card in pciexslot 1, blank screen, had to press power button for 2 3 seconds to shut it down.
Restarted again , single beep, bios post screen comes up and booted into windows.

Its the pci e card