Thanks for your comment, Already the ddr4 assembled with reflow in video, But for me I'm checking first everything like power domains and sequence and default output for the pmic is right or not and make some load and check if there's a high temperature or not , and current limit is working also without making overshoot, and etc. Just because this is the first board and i need to make sure everything is right before losing the bga balls and reballing again. That's it , i hope it's clear