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Did you check the DC Jack where the Power Cord plugs into the laptop? If it is bad (wiggly or loose) then the laptop will not power on. Take an ink pen and put it where the power cord would plug into the laptop and see if the jack wiggles or is broken. If so, that's your problem.
The old power cord might be some good if the problem is with the DC Power Jack.
Could be a combination of things causing this, "What to Check Out" first off it may be the power button it may be worn and in need of replacement. Second could be a short in the power pin input where you plug the laptop in at. Plug it in when working or not working and wiggle it around gently to see if it lights up or sometime shows a blinking light. If this happens then you will need to have that piece on the board replaced or soldered. Check for shorts in the wires itself see if there are bent wires or crimped up wires on the power cord. Animals are notorious for doing that sort of damage to power cords. So we know it is a power issue working and not working that is where I would start at. The sources as I explained above. Right now it is something that is shorting out. I believe without seeing the computer itself that the plug in power sources are the issue here. Especially the input plastic pin where you plug the power cord into is a common issue on laptops because they get bent or stepped on or pulled and twisted when using a laptop. This is why it is critical to be gently with these types of components. Keep animals away from chewing on them as well or when plugging laptops in to make sure the cords are not bent up or twisted but straight inline with the power source plug in on the laptop. This can happen over time as well. I think that is your issue. While laptop is being repaired if you do it yourself which I do not recommend if you have never done this sort of thing take it in for repairs. Make sure they clean the dust out of the fan and CPU areas as well. John
Sounds like your DC Power Jack is bad or broken. The DC Power Jack is where the power cord plugs into the laptop? Most times it get damaged by too much stress on it such as sitting in bed with the laptop, or putting the laptop in the laptop bag with the power cord still plugged in.
Take an ink pen and put it into where the Power Cord normally plugs into the laptop. If the pin inside the DC Jack is loose or wiggles then the jack is probably bad. Sometimes the jack can be completely burned out and you can smell smoke .
If the internal DC Power Jack is loose, you will have totake the laptop apart to repair it. The DC Power Jack is on themotherboard and most times it is soldered to the motherboard. That meansyou will have to desolder the old one and solder a new one in it's place. Sometimes the dc power jack sits in a slot between the bottom case and palmrestwhich hold it in place and has a cable harness that plugs into the motherboard.
The problem might be either from the charger or from the laptop.
To confirm and repair if it is the charger, all you have to do is to plug the charger on another laptop to see if it will charge, if it does not charge, then you know the fault is from the charger, and the solution is for you to replace it with a new one, before you replace it, try to connect another power cord to the charger, because sometimes the power cord might have been burnt, that have happened to me twice and replacing the power cord solved the problem. But if replacing the power cord does not help, then you need to change the power cord.
To confirm and repair if it is the laptop, plug in a new charger to the laptop, if it does not charge, then you need to understand that the charging port of the laptop is faulty and needs to be replaced, have a repairman replace the charging port for you.
You can get an exact adapter from eBay link below, they are quite cheap. Sometimes the break is close to the end of the plug, and sometimes, the actual solder on the socket inside the unit is fractured, causing intermittent connections. Often we are able to use the old cord Plug, and graft on the new power Lead. However it is wired and regardless of how many wires are inside, the is only One - Negative, the OUTER contact. The INNER Contact is Always + Positive, sometimes there are three wire inside, TWO are Plus, and ONE, the shield, is negative.
If I'm understanding you correctly, the wiggle is from the laptop. Sounds like a problem is about to happen. Your Presario has a loose power jack (connector inside the laptop). It is a part that can be replaced.
First easy check is to stick a toothpick into the jack to see if the middle pin is loose. If it's not loose, try another power adapter to check just incase. If you dont have one ask around to borrow a universal one. Dont jiggle and wiggle the plug with the power plugged in if it is loose because i've seen shorts happen.
usually plugs are mounted onto the mainboard. To get to the main board, you'd have to take apart everything because everything attatches to the main board. The case, keyboard, heatsinks, speakers, and so on must come off before you'll be able to see the power jack. With parts and labor, it comes close to a new laptop.
Hi, your problem is the DC socket Plug on the motherboard. This is a solution 5$ (for the plug only) and soldering iron and solder. If it is within warranty give it straight away for repair at their cost. THIS IS a VERY common problem to HP laptops. Dont Accept anything other than a full repair. (requires dissasembly of the plastics to expose the connector and be able to resolder it.)
If it is out of warranty then find the plug, and DIY or engineer friends may be in order :) If you send it to 3rd partie tech shops they may charge 100-150$ for a 5$ spare part..the rest is their time spent and many six packs.