Power on, no boot, no display
I’m repairing an Asus ROG Laptop model GL551J. It came in for Power on, no display, no boot. So far I’ve replaced the LCD, LCD Flex, and the motherboard itself. Still the same issue. I tried powering on without RAM and it does not beep or anything. Also has the same symptoms with the HDD removed. I have the stock power supply it came with. Does anyone have an idea on what I should try next?