Power button blinking , screen not turning on

I have bough a asus laptop at first my power button had problems and I went to a repair shop they fixed it and it stopped working , and some master offered me to instead of using the flex cable from power button to directly wire it , no whenever I turn on my laptop my indicator shows it’s turned on white power is blinking and then it shows that the computer is off and it blinks Orange on the power indicator usually shows low battery even with AC plugged in (he wired 4 pin connection straight to motherboard )