The PC does not turn on correctly, why?

Question

Windows

Hello! It's me again ;) I have such a question, after the computer goes to sleep (hybrid) no matter through the firmware or another (wise). Then when I press the power button back, the following happens: the PC starts but the screen does not turn on and the PC turns off, then a couple of seconds, the power button lights up again, the fans start working and turn off again, this happens 2-3 times, after which the PC starts up safely . During the whole working time, there are no unexpected shutdowns. But when I turn off the PC completely (START - POWER OFF), then the PC turns on normally, the first time.
What are these miracles?

Answer 1

What's the OS? What is iron? Often met, on old hardware (released before 2008) on windows vista and later - sleep mode does not work correctly. Never tried to figure it out. I just turned off sleep mode. I think it has to do with ACPI. Use hibernation - it is provided at the OS level, and works correctly on any hardware.