Laptop turns on for about 3-5 seconds then shuts off

Dell Precision M6500 Laptop turns on for about 3-5 seconds then shuts off. The original issue I was checking out was when I turned the laptop on, it was on a "Testing Memory" screen but the status bar only filled up a quarter of the way and seemed like it froze. I waited a couple minutes and it had not moved. So I unplugged the power cord, removed the battery, and removed the memory sticks and held the power button down for about 30 seconds. Hooked everything back up and powered it on and this time the status bar for the "testing memory" filled up to 3 quarters, froze again and started beeping at me until I turned it off. Well. When I turned the laptop back on, you can hear the fans working and a few lights on the keyboard light up but then it just shuts off. Is this just a hardware issue? If so what would I need to order/replace? Any help would be great y'all, seriously. Thanks!

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Sounds like the usual motherboard.

Try unplugging HDD, ODD, WiFi, Bluetooth and use just 1 stick of RAM. Even the battery is optional at this point. I've even removed the keyboard for this last test. If that fails I nod to the motherboard but this model appears to find working ones out there for 369 bucks so repair is not usually done.

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Try this...

First unplug your a/c adapter, remove your battery. Then locate your CMOS battery and remove it as well. Once you've completed these task turn your computer upwards and then hold your power button for 1 minute to drain any residual power.

Once done, insert CMOS, close up laptop insert batter and/or a/c adapter and boot laptop back up. This should take car of your problems, but if not respond with your results.

If you aren't sure how to remove the battery I have attached this link to a video tutorial of a CMOS replacement in a M6400. The machines are almost identical but be on the lookout for a few different modifications due to one model being newer.

Good luck.

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One problem after another.

Well. While trying to remove the CMOS Battery (which I handled delicately) the white wire came out from the connector. So I removed the CMOS Anyways and did as you said and just hooked everything back up and went to boot pc and It's still doing the same thing. Does that white wire play a significant role? I'm looking online right now to order a new CMOS But it's pretty difficult.

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Well. AC power jack?

After trying yall's suggestions and with no luck. I've decided that the AC connector jack on the laptop is damaged. The Brick is fine. It works with other laptops. So does anybody know where I can buy a replacement AC jack for the laptop?

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Sometimes hard to find.

Last time round it was Jameco, Digikey, ebay, amazon for the search.

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That can cause a world of problems.

Your computer wont function without the CMOS. You'll need to replace it if the wire has been damaged. Also remember if you find yourself forcing stop and rethink your plan, unsteady hands can be a killer sometimes.

If this is becoming a task I suggest seeking professional help?

If you can handle the task replace the CMOS. I can't suggest any more repairs but if you believe your laptop is needing further assistance with the DC power jack i have acquired one for you here at this link.

Good luck.

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