I have been following this thread when it started, it seems to me the thread starter has made a some modifications to his first post.
As I clearly remember the word "IRREGULAR HOUSE POWER SUPPLY" being mentioned in the first post but couldn't find it today.

Today, it just struck me that it could really be a Lightning affected fault as the incident was reported in April.
Did a quick Google on "Lightning Season in Malaysia".. and returned this
https://www.thestar.com.my/news/nation/2018...safety-measures

"He said the most intense period for thunderstorms are from March to May, and from September to November."

The lightning doesn't have to strike near our house, even a lightning happened 2km away can have severe repercussions.
I remember some 18 years ago, Lightning strike very close, my whole electrical system blink, and next I know my Printer fried but my CPU is intact. VERY ODD, but true. Obviously when sending it back for warranty claim, I didn't divuldge what happened. Two times it happened, and both times I never bother to go back to claim my printer back. Just buy a new one.

Then the time of ADSL modem, and BELKIN Surge arrestors - If we need to claim warranty, we need to sign off exactly the place, time and date the fault happened. It does explain a lot why Electronic products does not cover lightning caused damages and always the reminder to unplug the telephone line to adsl modems during a thundersorm.

Not accusing anybody of anything, just contributing to discussions. No hard feelings okay.