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TOSHIBA M40X-250 POWER UP CREATES LOUD OUTCRY LONG TONE FOLLOWED BY TWO SHORT ONES. REPEATED TIL DC POWER JACK HAS BEEN PULLED OUT. WHO HELPS.

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Sounds like u have a short in r power supply thats what the loud squeel is coming from had that done before i bought a new supply and worked like a charm

Posted on Jul 18, 2009

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Asus k53e won't turn on


That particular model Asus laptop are susceptible to over heating on the DC power jack and finally creating a short due to the shotty work on the board and or the possible shotty DC power jack. If you computer will not turn on and your battery is probably dead and even plugged in the power light does not come on? Then it is your DC Power Jack on the laptop. So the DC power jack for that model will run you between $0.48-$6 bucks. However if you are a soldiering guru then you can disassemble the laptop and remove and replace it. However, it is not cost effective to let a shop do it, because they will charge you way to much for the job. Honestly, it would be much cheaper and more efficient just to buy yourself another laptop. If you know someone who is savvy enough they can removed your hard drive from your laptop and pull off whatever data you want and move it onto your new laptop.

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How do I unlock my scroll lock on my toshiba m40x


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My toshiba a 205-s5825 satellite wont power upo and no lights nothing


The problem is in the power supply adapter, or the dc jack in the laptop is loose, if you move the cord from the power adapter to the computer and it comes back on then it is more than likely the dc jack in the laptop that is attached to the motherboard. The remedy is to replace the dc jack or resolder the old one, in order to do this the computer must be taken apart down to the main board for service.

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Toshiba laptop L505 won't turn on


Remove main battery and turn on, next! check the power supply for correct voltage, if okay! sub the ram out one out a time and power on and repeat. If still no result, the DC jack in the laptop is a common issue, suggest a professional to assess.

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What happen when u replace the battery and power cord, and still , the laptop will not come on nor will a power indicator light come on


The problem is most likely in the DC jack in the laptop, Plug power supply in the DC jack, now put your thumb around and gently push sideways and upwards, as you do this press the power repeatedly to see if it will start, if yes! the DC jack needs to be resold-ed back on the motherboard or replaced. The jack replacement will require that the motherboard be dis-assembled to complete the job. If after all this and still no result, the motherboard is the likely problem.

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How to replace dc power jack for toshiba p15


Take apart laptop and see what type of jack is on your system. There are two types. one is soldered on and the other is a module that connects to the motherboard with a wire connector.

If you have a soldered on type the you will need to de-solder it from the board then solder a new one onto the board. most ac jack issue just need to resolder it unless the jack itself is broken.

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I opened my Toshiba satellite laptop to fix the DC Jack. Now it wont power on. Any ideas why


when you fixed the jack did U accidently solder anything else to the connector , sounds like a short, causing a ground fault.

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2 Answers

Screen black & with no power


hi there,

you can follow this instruction and try to your laptop to resolved the problem.

A bad connection between DC-IN power jack on the system board and the system board is a very common problem with Toshiba Satellite M35X and Toshiba Satellite A70/A75 notebooks. If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it’s still under warranty, it would be fixed at no charge to you.
Problem symptoms:
  1. Laptop randomly shuts down without any warning.
  2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
  3. The battery will not get charged.
  4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).
To fix the problem, you have to take your laptop apart, remove the system board to resoleder or replace the DC-IN jack. Toshiba Satellite M35X and Toshiba Satellite A70/A75 disassembly guides will help you to remove the system board. Take a closer look at the power jack on the system board with a magnifying glass. In most cases you get the power problem because of a bad connection between the DC jack and the system board, you’ll see a crack between the DC jack connector and the system board.
Here is an example of Toshiba Satellite M35X power jack. The crack occurs between the DC jack pin and the system board.
satellite-m35x-crack.jpg satellite-m35x-contact.jpg In some cases the connection is good, but the DC jack is bad itself. You can find a new DC jack for Toshiba Satellite M35X and Toshiba Satellite A70/A75 laptops here. Search for DC jack M35X or DC jack A75.
How to resolder laptop power jack yourself.
UPDATE:
Sometimes, after you replace the jack, you can see that the system board doesn’t get power at all. The battery will not charge and the power LED will not light when you plug in the AC adapter. So, here’s a possible explanation.
When a connection between the positive pin and the motherboard breaks (cracks), the power jack gets loose. You can feel it when you plug in the adapter plug. A loose power jack can damage the trace inside the hole in the system board. Take a look at the picture.
power-jack.gif As you see, the positive pin goes through the hole in the system board and you solder it on the top side. Right? What if the trace between the top side and the bottom side is broken somewhere inside the hole? I’ve seen it before a few times. In this case everything looks nice and clean on the top side. When you plug in the AC adapter, you get normal voltage readings between “+” and “-“ pins on the top side, but the power DOESN’T go to the motherboard at all, because there is no connection between the top and bottom sides. Test with a multimeter if there is a connection between the top and the bottom.
If the trace inside the hole is broken you still can fix it. You can run a wire to connect the top and the bottom sides. Be careful not to short something on the board.
Update:
Here’s another solution to fix the power jack problem, it shows how to relocate the power jack outside the laptop base. Check it out here: Toshiba Satellite A75 failed power jack workaround.
When you repair a loose power jack, it’s a good idea to check the jack on both sides of the motherboard. When you remove the top cover from a Toshiba Satellite A70/A75 laptop you can see only points where the jack is soldered to the motherboard as it shown on the second picture in this post, but you cannot see the jack itself as it shown on the first picture.
Removing the motherboard from Satellite A70/A75 laptop is a good idea because the jack itself might has a broken “+” pin, as it shown on the picture below. If the “+” broke off the base, you’ll have to replace the jack.
power-jack-broken.jpg

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Replace toshiba satellite m40x (z008) 60GB toshiba HD with a Samsung HM160JC 160GB HD


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