My series X sees very little use and is kept in a space behind my TV that is well ventilated and where dust cant really accumulate. Console was working fine one day and then the next it wouldn’t power on. No chime, no light. Took it to UBreakIFix and they tried a few things, but the main concern was the power supply. After replacing it, all it does is chime. No light, no display. They have deemed it unrepairable. But if anyone has any suggestions for where to look next, please let me know. I’m not new to electronic repair but my knowledge of the Series X is fairly minimal.