Question Lenovo Ideapad 330S-IKB15 won't start up

Aug 5, 2023
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When I press the power button my laptop doesn't start up. At first I could see an orange LED turning on, than later a white LED, after the battery was charged i guess.

This issue came up after I built in a 16GB memory module.

I tried to start it up with unplugged battery and plugged in power cord and vice versa, but it did not solve the issue.

I even unplugged CMOS battery and pressed the power button for one minute, while battery and power cord was unplugged, but still no change.

Ultimately I removed RAM module, SSD, HDD and went through all the steps mentioned above but still no change.

So what could be the issue? What else could I try?

Thank you for yor help.