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How can you tell if my computer is fried? the DC power adapter plug on my laptop was damaged and a friend of mine tried to soldier it, but it didn't work. So I purchased a new power adapter plug, but my laptop still won't come on. None of the lights on my laptop come on, NOTHING happens! No noise, no light, the cd drive won't even open. HELP! What could be the problem? I've tried to add on an external hard drive, still nothing.

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  • estuardo aguirre Dec 22, 2012

    Similar problem. Dc power connecter was shorting and after two shorts power never came back on even after replacing dc power adapter. If motherboard is damaged, how do i fix it. Is there an internal fuse like on a tv or stereo? Someone please help!!

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  • 174 Answers

You remove the battery pack and power on with adapter.
your friend may connected the wire wrongly then mother board may damaged

Posted on Apr 09, 2011

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Laptop is turning on and off


Remove the AC adapter (Charger)

PROPER method is to disconnect the power cord of the AC adapter, from power; THEN unplug the AC adapter from the laptop.

Same thing in reverse to plug the AC adapter back in.
AC adapter is plugged into laptop, THEN AC adapter is plugged into power.

Unplugging the AC adapter from the laptop, while being plugged into power; can cause a Voltage Spike.

You may get away with it for years, and several laptops; and have no problems.

However it only takes ONCE, to fry out the SMD fuses, Multi-Layer Ceramic Capacitors, and Power MOSFET's, on the laptop motherboard's DC to DC circuit.

Jus sayin'.

Moving on........

AC adapter removed, remove the Battery.
Press the Power On button in, and hold in for a count of 10 seconds.
Let go.
Do this procedure 2 more times.

(Draining residual power)

Reinstall the Battery. Attach the AC adapter, plug AC adapter into power. Let the Battery charge 24 hours.
Then turn the laptop on, and tell me what happened.

Regards,
joecoolvette

Mar 15, 2013 | HP Pavilion Computers & Internet

Tip

How to troubleshoot your laptop at start


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.

on Mar 27, 2010 | Computers & Internet

Tip

How to troubleshoot a dead laptop and find the problem


We may offen face the same problem :when our laptop is dead. 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, LED will not light up, the fan will not spin, the screen is blank and black, etc… In short, the laptop is dead.
apple-a1172.jpg?w=300&h=225
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.
hp-pavilion-dv8000z4.jpg?w=300&h=225
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. Check out this guide for fixing laptop 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 that’s the case, check out these tips for troubleshooting laptop with backlight failure.
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.
In my case removing the hard drive and DVD drive didn’t help. Unplugging the video cable didn’t help either.
I continued taking my laptop apart piece by piece and tested it after each step.
I removed wireless card, modem, disconnected the keyboard but it didn’t help.
98-01200-001_replacement-acer-aezl1tnro19.jpg?w=300&h=225
I still wasn’t able to boot the laptop with video on the external monitor.
Finally, I disassembled the laptop and removed the motherboard.
On this picture you see my final test. The motherboard has been removed from the base and I assembled basic barebone system on my bench.
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 I 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. may be this arcitle is good for you.thank you for reading.

see more information from http://udtekbattery.wordpress.com

on Feb 08, 2010 | Computers & Internet

1 Answer

My laptop cord fried wen i plugged it into my laptop, i can't see any damage too the cord itself but the laptop won't turn on. I removed the battery and tried powering on the laptop that way, but...


It could very easily be either a fried motherboard, a broken connection on the DC jack within the laptop, or a fried DC Jack. It is typically at least a $200 fix if you go through GeekSquad or the manufacturer - maybe more if the motherboard is fried. Unfortunately, there isn't an easy solution to this one.

Aug 23, 2011 | Compaq Presario CQ56-115DX Laptop

3 Answers

Battery can be used to power computer. Plug cannot. Tried a different power plug from a different computer with around the same voltage and whatts, but still didn't power. This is a DC in power plug...


The problem is most likely the DC connector in the computer. I have replaced many of these. Normally what happens is the connector is stressed by moving the computer while plugged in stressing the connector. It could also be the DC converter board but .... that would probably affect battery operation also.

To replace the connector, you have to completely disassemble the system down to removing the main board.

Jun 21, 2011 | Acer Aspire 5050-3371 Notebook

2 Answers

Dell 2650 DC wont work


make sure the charger you purchased has the correct voltage out and amperage(in millivolts) as requested by the laptop computer, if not you risk the chance of damaging your laptop. although they fit in the power plug, it does not mean theyre compatible. The specs should be located at the bottom of the laptop or inside the battery bay.

Apr 01, 2010 | Computers & Internet

3 Answers

Gateway 7330gz Laptop Won't Charge


Could be your connection inside the laptop itself.
They tend to go easily in gateways.
The wear and tear from plugging it in and out.
Cost approximately $70.00 - $100.00 to repair.
Can usually get the best price at a small computer repair store

Jan 12, 2009 | Gateway 7330GZ Notebook

9 Answers

Dead Toshiba A100 laptop computer


In order to replace the power jack in your laptop you’ll have to remove the jack from the motherboard as I explained in the previous post: Replacing DC power jack.
While removing the jack you can accidentally pull out the internal copper coating (I’ll call it a sleeve) from the inside of the “+” terminal as it shown on the picture below.
9807c6d.jpg
The internal copper sleeve has been removed and cannot be installed back. If you solder the power jack back on the motherboard without this sleeve it might work but the connection between the “+” lead and motherboard will not be reliable.
In the following guide I explain how to fortify a damaged power jack connection. You can use this repair technique in some laptops with similar power jacks.
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. Check out thisguide for fixing laptop power jack.

Jan 12, 2009 | Computers & Internet

1 Answer

Ive used a generic dc adapter and it was charging


Possibly. You should always use the correct DC adapter. Try switching the adapter and then the battery if that does not help.

Aug 20, 2008 | Compaq Evo N1000C Notebook

2 Answers

HP home edition ze2308wm keeps seitching from AC to battery


The soldier holding the DC jack on the machine has broken loose. If you can, you should take it back to the place you had fix the jack and have them resoldier it. These are very small connection points, and if they don't get the soldier in there good, will break loose. It's a common occurrence, I've had it happen to a few of my soldier jobs, they should take care of it. Be careful with the way it is now, you can do severe damage if the connection point gaps and creates an electrical arch. I would suggest not using it until you get it fixed.

Jul 15, 2008 | HP Pavilion ze2000 Notebook

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