Asus Zenbook PWM issue - changing screen

[BorealMind]

Asus is a great brand with probably the best design, endurance and utilities. Yet there is a common issue that plagues all their high-end laptopts which is PWM, recently culminating in a case where the UX430 model costing more than 1.000 Euros had 200hz PWM across almost all brightness levels (same thing happened with the top-notch ThinkPad few years ago).

I've tried everything eliminating PWM on my one, which is luckily, sufficiently higher at around 1000hz (Asus UX303LN). No utility seems to make any effect, the screen strangely has PWM even at 100% brightness settings while IntelPWMcontrol displays a C++ Assertion failed error. The PWM flickering is present even in BIOS and - i repeat - at all brightness levels indicating it might be a hardware issue meaning that it is regulated not by a driver control but by an electric controller.

My question is: does it make any sense to change the screen on this laptop for a PWM-free one or will the issue still be present if the given controller isn't part of the screen but of the motherboard??

Similar Asus laptops don't use PWM till 90% brighttness at least so it might indicate it is indeed in-built in the display. I would need some confirmation before ordering another display and dismantling the machine.

Thank you.

PS: The display is Samsung YLLTN133YL01-L01 used on Lenovo Yoga 2/3 Pro.
https://www.ultrabookreview.com/4274-asus-zenbook-ux303ln-review/#a4

 

[Lutfij]

I would ask you to have Asus to take a look into the matter since opening up the laptop and doing it DIY, can and will void your warranty. I understand what you're saying but the panels would be sourced from the same factory and in the same batch as well as being assembled on the same line at Asus's factory. Meaning that the issue would be wide spread. Are you yet within warranty period?

Asus could honor their customer base and offer a free replacement or a change in the model. It might even be possible that you're among a very small number of the population whereby you notice the flickering at all levels. I noticed the same issue on my Dell U2311H but the entire lot of displays that came to my country had the same issue. Had to put my hands down for my issue.

 

[BorealMind]

I would ask you to have Asus to take a look into the matter since opening up the laptop and doing it DIY, can and will void your warranty. I understand what you're saying but the panels would be sourced from the same factory and in the same batch as well as being assembled on the same line at Asus's factory. Meaning that the issue would be wide spread. Are you yet within warranty period?

Asus could honor their customer base and offer a free replacement or a change in the model. It might even be possible that you're among a very small number of the population whereby you notice the flickering at all levels. I noticed the same issue on my Dell U2311H but the entire lot of displays that came to my country had the same issue. Had to put my hands down for my issue.

This computer is way out of the warranty period as it is 3 years old. I don't notice any flickering with my naked eye. Just a strain in the brain under certain viewing conditions. The peculiarity is not the PWM per se but that it is used even at 100% as seen by my camera whilst most laptops use it only to dim the display bellow 90%.