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When I unplug the mains adaptor on my laptop the screen goes brighter and then duller when the mains reapplied. How do I change it around

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This is usually a BIOS adjustable feature. During startup, press the proper key (*) to enter BIOS. Look for LCD or something that would deal with brightness. Make the adjustment as desired.
You can adjust the brightness while running the computer using (usually) the function key and the brightness key. But only the BIOS adjustment will be permanent.

(*) Each computer manufacturer has their own key to get into BIOS so Google for your brand to see which key it is. Usually f2 or f10.

Posted on Nov 12, 2009

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Usually when i plug in the charger to computer the screens gets brighter, it no longer does that, my screen is very dull and not bright how can fix?


you can change that in power settings right click on the battery bottom right of the screen hit change power settings u will get options u want to change power settings look at the options you want to make it stay brite all the time right now you have it set to be brite only when plug is in change the option when its unplugged to brite also

Aug 10, 2012 | Acer Aspire 7741z

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I am in South Korea and my macbook won't charge. I am using an adaptor.


I understood what you want to say, but main thing is that which adaptor you are using ?
I think you should change/REPLACE your adepter because the battery problems rarely occurs but the charger creates problems most , in your case your macbook is safe but adaptor goes in critical condition.
thank you for give me chance to help you

please give your ratings!

Feb 20, 2011 | Computers & Internet

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Dc jack of labtop getting vey hot


A common weak spot on most laptops is the DC power jack. If someone trips on the wire while you have the power adaptor plugged into your laptop, chances are that the power jack will get damaged.
On most laptops the DC power jack is soldered directly to the motherboard and there are only three or four small pins holding it in place. Unfortunately that makes the power jack quite weak. Any sideways pulling of the DC power cord while attached to the laptop will usually dislodge at least one of these pins, breaking the solder around it. Modern laptops use quite a lot of power, from about 70W to 120W or even more. The bad electrical connection from the dislodged pin will cause sparks and heating that will eventually burn a hole through the motherboard and can even be a fire hazard.

The usual signs of that are:
  • The battery is not charging properly or stays at half charge despite that you have been using the power adaptor.
  • The screen flickers (the brightness is changing) while the power cord is plugged in. This is caused by the laptop switching between DC power (screen is brighter) and battery power (screen is dimmer).
  • The DC plug gets hot after a few minutes of use and may even smell of burning.
  • There are "scratching" sounds coming from the DC jack.
You need to take the unit apart and check/resolder the DC jack on the system board.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response

Thanks, Joe

Feb 15, 2011 | Computers & Internet

1 Answer

Dell Inspiron 9300. Problem occurs when I try to charge it. The screen says it can't determine the adapter type and the battery does not charge. I can wiggle the charger cable around at the connection to...


The same exact thing is happening to my Inspiron 9300. Did you get it repaired? After reading lots of forums, changing AC adaptors and ordering a new battery, I came to the conclusion that it is the plug on the laptop that is not working.

Nov 17, 2010 | Dell Inspiron 9300 Notebook

1 Answer

The screen brightness changes due to plug in or battery power


This is quite common actually I see it a lot. There really isn't any reason, it seems that when on batteries it trys to save power by Dimming Down, but it often just mucks up.. I always now set it via the keyboard keys. whenever I change from power adapter, to battery.

Feb 10, 2010 | HP Pavillion ZV6000 Athlon 64 3500+ 15.4in...

1 Answer

Powere adaptor has to be unplugged to boot


There could be a problem with the battery. A fast check to determine whether you have a problem with the power adapter, power cord or the laptop's battery is to turn off the laptop, remove the battery, connect the power adapter, turn on the laptop & see if it works.
If the laptop works directly from the power adapter with the battery removed, then the power adapter is good. In this case we can suspect that the battery is defective & needs to be replaced.

If this did not work, try also disassembling the laptop & make sure that all main components are seated properly. Also make sure that all ribbon cables interconnecting the various components of the laptop are tightly connected.

Dec 22, 2009 | Dell Precision M90 Notebook

1 Answer

Screen goes black


Try run the computer on main power and check.
If it still does not run then it is issue with the power circuit on computer and make sure this check the power adaptor working properly by connecting to another computer. "It is turning out to be hardware issue. Contact gateway then

Apr 30, 2009 | Gateway MT3705 Notebook

2 Answers

Lack of brightness on battery. OK on power supply.


there should be an Fn + one of the F keys function to make the screen brighter or dimmer.

Mar 18, 2009 | ASUS Eee 4G Notebook

2 Answers

I walked away from my laptop for a few hours. When I returned to use it the screen was black. Since that time the low battery indicator has been lit (pink). I alway have it plugged in so It should not be...


This isn't a software issue. If your laptop is still under warranty have it serviced. If not, see if the costs involved are even worth it. Something within the hardware sounds like it caused a chain reaction and has affected more than just the battery.

Nov 05, 2008 | Gateway Computers & Internet

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