Have to wait for 10-15 minutes for power button to get activated

Hi, TronicsFixers. I got one weird acting CUH-2116 on my table. After plugging in (to power outlet) and pushing power button, it has no effect - console won’t turn on. No sign of life at all - no beep, no cooler whirling sound no HDD, only pushing eject button creates beeping sound. Bu if I wait for 10-15 minutes the power button comes active, acts like it should and I can turn console on. After I’m able to turn it on, it sometimes goes to WLOD mode; sometimes it shows me “Updating firmware” screen followed by “Connect your controller” screen (haven’t had success to get past this yet)…I’m able to turn console off on holding power button and after that power button is “deactivated” again. Just need to repeat the “unplug-plug-wait for 15 minutes” cycle again. Any thoughts how to identify is it faulty PSU or faulty motherboard (APU)?

Yio…hi…same for me but…after 10 or 15 minutes…no more for me…alway no light. …no bib…nada…test my power supply 3 time and is good…I’m sure is good…I think is the on/off board…n#tsw-002…but I’m not sure…somebody can help me please?thank a lot

Test for continuity on the apu’s capacitors with a decent multimeter it will tell you if the apu is bad