Question about HP Pavilion ze5470us Notebook

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Ze5470us DC jack

I am trying to open my ZE5470US laptop to replace the DC jack and there is something keeping the base from seperating from the top. The side where the DC jack is located is where the problem is. I can easily open it at the other three corners. Any ideas or hints?

Thanks, Rodney

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Asd

Posted on Oct 30, 2008

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Have hp pavilion ze5470us that powers on but only blinking cursor shows on screen. Was working fine just a few days ago. Nothing new has been added.Hdd tested ok. What else?


That blinking cursor is the way in which the BIOS is telling you that Windows is missing - its most critical, core files have been corrupted beyond repair. The only thing you can do is to reinstall using the recovery cd or your own Windows install disk.

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How to open case Toshiba Satellite L355-s7905 laptop. Relace dc jack. Opening laptop case. Does replacing dc jack require soldering? Does rewiring require soldering, or are there connectors with new dc...


Hi I have the same laptop and had the same thing happen. I am not a tech, just some dude that is handy and has "messed" with hardware for a bit. So this advise is "USE AT YOUR OWN RISK", I'm not responsible for anything. Well with that said here you go.
Remove the batter for safety. As you go keep the screws separated so you don't have to remember which is which when you put it back.
Flip the laptop over and you will find about a dozen screw holes labeled F7. You need to remove all of these to open the laptop. You'll find some running along the back edge of the laptop as well.
In the battery well, you'll find some more screws labeled F4, you should remove these as well.
There is a slider screw towards the right center of the machine that helps hold the cd bay in place, you don't have to remove this one, but you can in the even that you need to move the bay to gain better access to the DC jack.
Once you remove all the screws, flip the laptop up right. Open the screen as if you were going to use it.
Along the top of the keyboard, you will see that the bezel edge has a break away section the same with as the key board.
Using a small flat head screw driver pry it open from either the left or right side, and continue unclipping it across.
This will expose four very small screws. Remove them making sure to keep them safe, as they are holding your keyboard in place. Once you remove them, slowly seperate the keyboard from the body of the laptop. You will find a flat wire connected to the mother board from the keyboard. You can use a toothpick to slowly slide out the white edge from the brown connection bridge. Once you slide the white plastic peace away from the brown the wire will come out easily. BE CAREFUL with the wire since it is very fragile
Now you should have the keyboard separated from the laptop, put it in a safe flat place and continue.
On the left side hand of the laptop body is a card slot, use it as a finger hold to gently but firmly pry the laptop open. It is held together by clips running along both side edges and the front edge. These can be a little tough to open, so apply slow gentle force till you hear them pop open.
Before you pull it apart after unclipping it, use the same method used to remove the keyboard flat wire from the mother board connection on the three connections holding the top part of the machine to the motherboard. You'll find two towards the bottom center and one at the top left corner. Play close attention to the small flat white one as this is VERY fragile and the copper flanges at the end can bend very easily.
At this point you should be able to freely separate the top half (cover) of the pc from the bottom. Exposing the insides.
You'll be able to easy work with the dc jack now, in my case it was the plastic housing of the body of the laptop that broke. I held it in place with a dab of hot glue.
If you find that the CD drive is in your way, you can remove the two small black screws on either side of its copper connector, then lift the back of the bay up of the body and slow pull it and lift towards the left.
Work backwards to put it back together.

Feb 19, 2010 | Toshiba Satellite Pro L300 Notebook

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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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1 Answer

HP ze5470us memory upgrade not fully recognized


Hi there,

I am almost sure that you, by accident of course, switched the memory blocs, so that you have put in one 256MB and one 512MB.

Have a look at the once you have on the table.

/Teis
66c5b73.png

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1 Answer

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You need to remove the screws on the bottom of the laptop. Once the right screws are removed the case will seperate exposing the MOBO and that and you should see the dc jack (power jack) as forwarning, almost ALL dc jacks are sodered to the motherboard..and not easy to successfully replace.

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Repair costs could run you $50 and up depending where you take it.

Example Site

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Hi

DC jack replacement is easy however requires a bit care since its mounted on the mainboard. Desolder the old DC jack. Solder the new one firmly. Dont keep the soldering iron too long on the PCB as it will damage the lines and will deform the DC Jack. You can get DC jack very low cos from local repair stores or you can order from Toshiba parts depot (800-524-8338)
Please post your question if you need further assistance.
Good Luck

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