I have a Acer extensa 5235, when i turn on, screen lights up and turns off within 3-5 seconds.
I have tried putting in new cmos battery and the foll wing.
I have done the process of, Removing your battery from laptop/unplug the power adapter. Hold down the power button for 45 seconds. Allow the laptop to sit for 20 minutes. Connect the battery and adapter, turn it on.
I tried the adapter in and battery out in-case it's battery.