Hi, this laptop came in no power, was a shorted CPU mosfet (dual). It powers up now, kb backlight, CPU and GPU get warm, fans spin, seems like normal boot current profile (up to 2A) but no display. Already tried a downloaded bios and no difference. S/N - NHQ7YAA0040300C8AC3400. Thanks....

Thanks!

Thanks!

After soldering the EC I usually push each pin to make sure it's soldered properly and I check for shorts between adjacent pins with beep mode, I go through each pin first testing continuity from the pin to the pad then checking for short to the adjacent pin and keep walking the probes down. As for the PCH, with the thermal camera, it's the only thing heating up when I apply power but it's uniform heating so I'm not sure the PCH is dead... unless it's not supposed to heat up or is there a way to test the PCH? I haven't gone through the power sequence yet... still looking for it on the schemat...

Hi, I'm working on a Legion 5, NM-C221 Rev. 2.0 board. Charging port replacement butchered by other shop and EC took a hit. I ordered replacements from China (shums) soldered it on and nothing happens, no lights. It does get 3.3V bot no 5V, draws 50mA. I read on another thread (Lenovo y540-17IRH IT8226e-192 - Badcaps) that it should auto-program but I'm not sure how that process works, should I wait 30s, 1min... then lights will come on, do I need to flash a particular bios or is there something else wrong with the board? Any assistance is much appreciated, thanks.