My Acer Aspire 5742 won't turn on

My Acer Aspire 5742 is experiencing issues with powering on properly. When attempting to turn it on, it shows a blue light for about 10 seconds before shutting off again when running solely on battery power. Meanwhile, when connected to the AC charger, it initially turns off after 10 seconds, then turns back on, but the screen remains black throughout. I have tried basic troubleshooting steps such as removing the battery and unplugging the charger, then holding down the power button for 30 seconds before reconnecting the power sources and attempting to power on the laptop again. But it's not working, my fan it working and I have even removed and the CMOS battery and put it back still it not working.