Ux325 doesn't boot up. Power button lights up just once

[DeepEnigma]

System: laptop
Battery or AC: both
Model: ux325ja
Frequency of occurrence: permanent
Reset OS: not possible
Screenshot or video:
========================
Detailed description：
Since today I experience a new problem with my UX325JA. It came back from RMA just last month. Now it doesnt't boot up,
Just watch the attached video file.

[Blake_ASUS]

Hi there,
so this is the first boot up after the RMA?
Please long press the power button for 40 seconds to see if it boots up.
Thank you.

[DeepEnigma]

Tried it plenty of times. Just a single blink from the Power button. Nothing more.

[RAJU_MSC_MATHEM]

DeepEnigma

1. System: laptop
2. Battery or AC: both
3. Model: ux325ja
4. Frequency of occurrence: permanent
5. Reset OS: not possible
6. Screenshot or video:

========================

Detailed description：

Since today I experience a new problem with my UX325JA. It came back from RMA just last month. Now it doesnt't boot up,

https://us.v-cdn.net/6031231/uploads/FG1B7B6OUXNC/20210522-051155.mp4

Just watch the attached video file.

Ux325 doesn't boot up. Power button lights up just once

remove all ram modules from the laptop if possible.
and then press the power button, if laptop is powered on ,but no display means ,
switch of laptop.
then clean gold plates of RAM modules by white eraser and then reinsert one ram module and then power on laptop.