MacBook Air totally unresponsive to power up
My laptop is unresponsive to any attempt to turn on. I did the SMC and NVRAM resets, I opened and inspected and found nothing unusual, I unplugged the internal battery and attempted to boot with just power cable, I’ve held the power button for extended period, I tried shift+ power long hold.
Nothing has worked. When I push the power button, I hear barely a moment of electronic noise or fan creep and then it dies instantly but this is not consistent.