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When i plug the adapter in a laptop the screen goes faint

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Boot to the BIOS, check the LCD Setting for brightness on AC, set it to maximum

Posted on Aug 30, 2010

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Screen only lights up on battery power but no ac adapter/charger tried three ac chargers all do the same thing so its not screen or charger


Hi David
It sounds like a fault to its power transition section circuit. Actually, this circuit is built inside the mother board to your laptop.
Please contact the authorized service center, and describe and show them the problem you do experience now, with your laptop. It can be rectified. Gopakumar Gopalan Google

Feb 28, 2014 | Acer Aspire 7720 Notebook

1 Answer

HP screen goes black 5 seconds after ac adapter is plugged in or out


This may not be the ac adapter itself. the metal prongs on the side of your HP Laptop to connect to the wire of your ac adapter may be bent or shortciruited. try to get a replacement which may be hard depending on what type of HP Laptop you own. or you may just have to send it back if you dont know how, in order to avoid breaking the warranty policy by mistakenly damaging it.

Apr 18, 2013 | Computers & Internet

2 Answers

My hp mini 210-1000 boots up well both on battery and adapter but it displays faintly on battery while it display well on power adapter


the problem is that its set in the power saving options. i mean on battery its set to power saver . while on power adapter it changes to hp recomended or high perfomance. So if you want to change it go to the right bottom of your screen and click the battery symbol it should give you the option to 1> change screen brightness 2>more power options. Go to more power options and select "change plan settings" beside the power saver.(not the one beside the other options) and change ur brightness. but its always better to keep it at ur minimum(with what ur comfortable) as its helpful to save battery

Jan 10, 2013 | HP Mini 1000 Netbook

1 Answer

Inspiron 1525 screen goes black, image is very faint on the screen. computer remains on. What is the problem


Sounds like the backlight for the screen has died the part isn't that pricey but having it put in will probably cost almost as much as replacing the laptop. You can always plug into an external monitor, however that is not very portable

Oct 11, 2010 | Dell Inspiron 1525 Laptop

1 Answer

The laptop just went dead. Does not power up off


check the pins on the adaptor connector that goes into the laptop socket....
they all must align correctly....
normaly it will have three pins, even if one is bent or mis-aligned it will not work....use a small screwdriver to slighly adjust the pins to the aprox correct postion...use a mignifying glass to have a look into the pins....

Dec 17, 2009 | Toshiba Satellite A105-S1712 Notebook

1 Answer

HP Pavilion dv9700t battery dead, faint blue flash from plug


Check your mains adapter plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced.

If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.
This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. I suggest you get a quote first.

Oct 18, 2009 | HP Pavilion dv2700t 2.5GHz Intel Core 2...

2 Answers

TravelMate 240 will not start - it begins to power-up, faintly beeps three or four times, then turns itself off - all with a blank screen!


Try these troubleshooting tips and see if it helps....

Laptop is dead. How to troubleshoot the problem.
In this post I’ll explain how to troubleshoot a dead laptop and find the problem. The following troubleshooting tips are not model and brand specific, they should work for most laptops.
Let’s take a look at two different scenarios.
Example 1. The laptop is absolutely dead.
When you plug in the power adapter and press on the power button, there is no signs of life at all. The laptop will not make usual noises, LEDs will not light up, the fan will not spin, the screen is blank and black, etc… In short, the laptop is dead.

What you can do in this case?
1. Make sure the wall outlet is working and the laptop DC adapter is getting power from the outlet. Try another wall outlet.
2. Test the laptop DC power adapter, make sure the voltage output is correct. You can test the DC power adapter with a voltmeter.
3. Let’s say the DC adapter is fine and the adapter outputs correct voltage. In this case unplug the power adapter from the laptop, remove the battery, wait for 1-2 minutes, plug in the adapter and try turning on the laptop again.

OK, you tested the adapter and it’s bad. If you decide to replace the original DC adapter with a generic one, you’ll have to follow this rule:
The voltage output on your new adapter has to be exactly the same as on the original adapter. The amperage on the new adapter could be the same or higher.

If nothing helps and the laptop is still dead, apparently the motherboard is fried or there is a problem with the DC power jack. It’s possible the DC power jack is broken and the motherboard is not getting any power from the adapter. In this case you’ll have to disassemble the laptop and replace the power jack.
Example 2. When you plug the DC power adapter and press on the power button, the laptop starts making normal noises, the LEDs work properly but noting appears on the screen. The laptop will not start.
First of all, take a closer look at the LCD screen. Look at the screen under bright light. It’s possible that the image is still on the screen but it’s very faint.
If there is no image on the laptop LCD screen, test the laptop with an external monitor. Connect an external monitor to the VGA port on your laptop and turn the laptop on. You can toggle video output between the internal LCD screen and external monitor by pressing Fn and F4 keys simultaneously on HP laptops, Fn and F5 keys on Toshiba laptops, Fn and F7 keys on IBM laptops. Other laptops may use different key combinations.
Let’s say the external monitor works fine but the internal LCD screen has no image at all. If that’s the case, your problem could be related to the LCD screen or the video cable. Also, make sure the video cable makes good connection with the motherboard and the LCD screen. Try reconnecting, reseating the cable.
In my case, both internal and external monitors were absolutely dead. Neither of them had image. That means the problem is not related to the LCD screen or the video cable. From my experience I know that this problem could be related to the laptop memory.
Try reseating the memory module, maybe it’s not making good connection with the memory slot. Try cleaning contacts on the memory module with pen eraser. Try moving the memory module into another slot. Try replacing the memory module with another known good module, it’s possible that your original module is dead.
If you have two memory modules installed you can try removing them one by one, it’s possible that one of the modules is bad. Try installing different memory modules into different memory slots.

In my case reseating, swapping the memory module didn’t help. I was pretty confident that my problem is not memory related and I moved on.
Try removing battery, hard drive and DVD drive and turning on the laptop without these components.
Also, try turning on the laptop with an external monitor when the video cable is unplugged from the motherboard. If the laptop start with video on the external monitor, apparently there is something wrong with the laptop display panel.
Finally, disassemble the laptop and removed the motherboard.
1. Motherboard. Like on most laptops, in my case the video card is integrated into the motherboard
2. CPU with heatsink and cooling fan.
3. Known good memory module.
4. The power button board witch you need to turn on the system.
5. Working DC power adapter.

Still cannot get any video on the external monitor. The system turns on, the cooling fan starts spinning but there is no video.
At this point I’m 95% sure that the motherboard is dead. CPU failures are not very common, so it must be bad motherboard.

Oct 11, 2009 | Acer TravelMate 240 Notebook

2 Answers

Dell laptop screen goes blank when ac adapter plugged in


I believe I have found the problem with the 1525 that I am currently working on which has the same problem that you describe. Ultimately I think it's a problem with the inverter in the LCD. When the laptop is powered by battery the brightness is lower than full. When I plug in the power adapter the brightness goes to "full" and I hear a faint sizzle and the LCD's backlight goes off. Same as if you hold the Fn key and press the up arrow to brighten it, it will do the same thing when you reach near the full brightness. So for now I have fixed this problem by going in the Power Options and clicked on Adjust the display brightness on the left. Slide the slider to the left on the "plugged in" part and now when you plug it in it shouldn't make it go blank. I do want to note that I hear a faint buzz coming from the LCD when I plug it in. That must mean the inverter is faulty. WAY TO GO DELL!!!!!!

May 23, 2009 | Dell Inspiron 1525 Laptop

1 Answer

Good picture for 30 seconds then screen goes black with a faint ghost of the image


the 12V is for speakers.. the 245bw takes regular 120V AC (same cord as your computer)

the buzzing is annoying, though. i don't know if it's a "feature" or just a side effect.. ie, if i could take the case off and poke around, i would. 4 times out of 5 it's some dumb piece of tin reverberating from a transformer or something..

Dec 03, 2007 | Mag Innovision LT576s 15" Flat Panel LCD...

3 Answers

Good picture for 30 seconds then screen goes black with a faint ghost of the image


i hope the problem will be in LOT of the monitor...you need to replace the LOT

Jun 14, 2007 | Mag Innovision LT576s 15" Flat Panel LCD...

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