Ordered a Pi Zero w, arrived, but I did not check it before I soldered the 40 pin GPIO onto it. Now it does not seem to be starting at all.
I visually inspected the solders, they are not touching each other, then I checked for short circuit with multimeter, does not seem to have any short circuits.
Then I tried plugging everything I plugged into a working Pi 3B onto it (including the SD card, power, touch screen with HDMI and GPIO connection), no respond at all. no lights.
Then I tried to only plug in the power and SD card, no respond at all, no lights.
Is there anything else I can do to check the board? Could the soldering process have destroyed it with heat (I am not that good with solder)?
I don't want to return to seller, as it crossed continents to arrive in Asia, its not cost efficient to return.