SIL flashes 5 times then turns off
Recently I bougth a non working 15” MBP and when I try to power it up the fans and HDD spins up, SIL turns solid white with no image on main and external display. But 5 seconds later the SIL starts flashing 5 times quickly and turns off without any beeps. I tried to understand the issue I couldn’t find anything sadly. Googling the issue lead me to the RAM but I tried 5 different Ram module, tried SMC Reset and any other keyboard resetting techniques. The motherboard looks flawless but I noticed that one of the USB ports were misalligned with the chassis (I think it got damadged by falling) and a resistor on the 5V USB rail was failed and I bypassed it with solder.
Any help would be appreciated. Thanks.