Full Brightness n A8Js when running on batteries

Why is LCD Brightness so low when it is running on batteries? Even when its set to full its pretty low. How can do I repair that?

Also, my wi-fi disconnects when I shut the lid. How do I rectify that?

 

There's nothing to "repair". It's a setting in the BIOS. "Dim LCD on battery" or something like that; you need to disable it.

The setting is there for power conservation (LCD eats a large part of the power consumed by the notebook).

 

and what about the wifi??

 

I don't know, that's why I didn't answer that question. Maybe the wifi just loses signal when the notebook is closed (the antennae are inside the top case, near the LCD screen).

 

no way to keep a connection through stand by mode


if you want it to stay connected when its closed, go to power options and turn of stand by mode.

no way to have that brightness level without ac power

 

You can always manually change the brightness, can't you?

 

the settings in the BIOS is disabled but still i dont get max brightness when running on batteries

 

Well, perhaps there really is no way to force full brightness on battery, like stamar says...

About the standby: well I didn't even imagine that your notebook was set to standby when closed. If it is, then clearly that's the reason for which it disconnects. Go to Advanced Power Settings (rightclick desktop etc.) and set the computer to do nothing when you close the lid.

 

I have this issue also. The screen is about 25% brighter on AC rather than battery.

The bios is set for no LCD power managment, i'm on power4gear max settings with 100% screen brightness and i've function keyed the screen to 100%.

Any ideas?

 

thats wayyyyy too bad

 

Yep, it's confirmed. The "LCD Power Saving" setting in the BIOS has no effect on the LCD brightness when on battery. This can be for two causes:

- the BIOS setting refers to something else than brightness control
- the setting is buggy

 

ok now thats something silly by Asus

 

Would a bios update fix this?

 

Yep, gotta hope for a fix..

 

yes i wish they fix it soon because most of the time I'm mobile and even the highest brightness while running on batteries seems low

 

I've seen it with two completely different types of ASUS notebooks so if it's a bug it's a rather wellspread one.
It might simply be the setting changes something different in the power management of the LCD, than the brightness.

 

im pretty sure its wired into the screen itself

What it is is just a setting on the inverter to go up 20 nits, and they wire it to ac only.

So when its on battery it only goes to 200 nits. Ive seen this in many laptops, not the majority but many including the xps 170 and sonys.
They dont even want to let you see what the battery is with the screen set like that because it will get too low a score.
Thats my opinion , its not a setting at all its just wired that way.

 

Yep, then the question that remains is: what does the BIOS setting do?

 

It is just there because in the design it was a software optional change. But in reality its probably not.

I dont want to make it sound like im sure because im not. But my last laptop was the same way its just a voltage difference. When the battery is powering it its x volts and when ac is powering it its x+y volts so it goes on.
I mean the lcd is manufactured exactly that way the computer has actually no say.

 

Surely if goes brighter when the power cord is attatched then its just a case of a software/bios issue than a functional hardware issue?

 

You can't be sure of that. It can easily be implemented in the hardware. I really don't know about the implementation of these things, but stamar seems to know better; his explanation is quite plausible. I'm not going to open my computer to verify and I wouldn't know how anyway.

 

Im just using logic.

When I am on batteries I set the brightness to maximum and it doesnt go higher.
Therefore it must be the actual lcd.

Theres no setting above maximum. Its the LCD itself. My last laptop was the same way. It was a sont pcg nvr 23.


I think the actual solution to your problem would require some basic electronics and possibly some soldering.

 

Then what does the setting in the BIOS mean?

 

I think stamar already tried to answer that

Check his last two posts

 

Sorry sir

My bad for not reading his posts