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Wont power up

HI,please can you help me
I plugged up the power plug and my laptop still will not power on,i have tested power supply the right volts is coming out at small plug end that you put in think pad 2658-bum cheers from john

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You seem to have a power supply problem and it would not be cost effect or probable to buy/fix it.

Posted on Oct 28, 2008

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Wall plug not working

Hi Gabriel,

Try another wall plug first. If still no good, remove the battery from your laptop and try plugging in with no battery. If still no good, test your laptop power supply with a multimeter to see if it is putting out the proper voltage. If you can't do that, buy a replacement power supply. Many stores sell universal power supplies that come with tips to fit most laptops. If it still doesn't work, take the laptop to a service shop and have it checked out.

Hope this helps!


Mar 22, 2012 | Computers & Internet


How do I replace my Power Supply?

Ok there is generally nothing "Special" about mains, wall power supplies, they simply provide DC volts, via a step down transformer, or switchmode technology, now there are ONLY three important things to know and they are, the Voltages, and Amperage, and Power Plug Polarity. You can often find this A: In the manual under Power Supply Specification, B:Or on the Actual power Supply itself, If one looks carefully, there is always on a UL listed power supply, the Output Voltage & Amperage, often Polarity is indicated too. If not, that can be gleaned usually, by looking besides the power input socket, on the actual unit, and, it usually, has a little drawing, with a dot and a 3/4 circle around it, with a + & - showing what goes where. In almost all occasions, though, it is Positive to the CENTER, & Negative to OUTER, (or earth). All you have to do, is get any other power supply that has the SAME Voltage and Current rating, IE: 12 Volts @ 2.5 Amps. Now any 12 Volt supply that gives, the same or MORE than 2.5 Amps will do. You just need to ensure that the Plug is right, often the plugs are different, that too, can be overcome, simply, by cutting off the OLD, plug, and cutting off the NEW plug, and joining, Old, to New end on PSU. Again, usually, Positive is the Center, and the Negative is the Outer. Right go get that supply. Ebay or Radio Shack, are good places to start. Also any other "Laptop" power Supply that has same specs as described, will also work. As a matter of point, switchmode is generally "Cleaner" power than a transformer one.. but it is NOT critical. All laptop, and some other things, power supplies, have "Chips" in them, to "Help" with charging? thats what "they say" Sometimes, you cannot replace this type of power supply, with anything other than the exact replacement, BUT it is still worth a "try" it will/should not ruin anything all that may be compromised may be the "Charging" of the/any battery. That is why batteries can "Fail" and cannot be recharged, NOT due to the batteries actually being "Faulty" oh no, it is simply that the "Chip" has failed and that often, stops the battery from being "Seen" and/or recharged.

on Mar 02, 2010 | Computers & Internet

3 Answers

My laptop wont turn on, even when the power cord is plugged in. i tested the power cord with a multi meter and the cord has power


Have you tried removing your battery for a minute then plug it in again?
Check also your charger if it has a voltage output using your multi-meter. the expected voltage you will read is indicated on your chargers name tag in DC volts (observe polarity).

When you press the power button does anything happens to your laptop or nothing happens at all even indicator lights?

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Jan 06, 2011 | Gateway MT3705 Notebook

1 Answer

When you plug the power cord in the lap top does not even power up there is nothing

Your power supply is either faulty or your computers power supply area is faulty, if you have a light on the power supply usually green, you can tell that way if your power supply is working, the other way to tell would be a multi meter checking dc voltage from the power supply's end, if you get around 13-14.5 volts somewhere in that area, then it is supplying voltage and is okay, which would mean it would be your power supply in the computer on the motherboard is faulty, which needs serviced by the company if under warranty or computer tech, if your power supply is all the way in and plugged in the laptop, it's usually one of those two issues, it can still work on battery and sometimes it wont if it is the computer, i would first suspect the power supply itself first, and check it while plugged in , even plug it into another outlet just to rule that out. if the power supply is bad and you replace it, the computer should work fine, unless there is internal damage in the computer. Hope this helps.

Dec 01, 2010 | Computers & Internet

1 Answer

The laptop wont power on. the power supply has a quick flashing when plugged into the laptop but no flashing when not plugged in.

hi , it might be the mother baord power conector over time the burn out . lets do some test. 1, try another power supply of a same model and watts. 2, take out the battery try new power supply . if this doesnt work then chances are the power circuit board has failed might have too replace mother baord thanks hope been some help.

Sep 25, 2010 | Acer Aspire 5920-6727 Notebook

1 Answer

Power does not comes on but powersupply ok

Take out the battery and try again. If it fails this time also then there's a major hardware malfunction - start by testing the power plug then the rectifier circuits from the motherboard.

Jul 05, 2010 | Computers & Internet

1 Answer

I think it is dead it wont boot at all

Did you check your power supply? If the transformer goes bad, the machine will not boot up at all or turn on. To check the power use a volt-ohm meter set at direct voltage testing, put one test point on the outside of the cylinder and one on the inside of the cylinder (section which plugs into the computer while having the plug, plugged into the wall socket. If you get no reading, the transformer is dead, not your computer. You can purchase a replacement online. Make sure you match up the replacement type/voltage with the one currently have. See the information printed on the transformer.

Jan 28, 2010 | Acer Aspire 3050 Notebook

1 Answer

No power, no lights on laptop

I think you should check the real power supply ... 120 V in and what comes out ... volts (ac - dc) and amps or what fraction of an amp.

Please compare the old with the new power supply. The new power supply should be the same volts - same kind (AC or DC) and at least the same amp rating. You can use higher amp rating but not lower - lower will burn up - literally)

Volt meter ... always set it above the suspected voltage. Batteries are always DC. Houses, buildings, etc always AC. Power supplies - could be mixed - ac in and dc out.

So if you were measuring in your home, you set the meter to 130 or higher on the AC scale. If you were doing your auto, 24 volts DC (or so).

House current, probe color doesnt make any difference. Should read about 120 Volts between the narrower (or right side/ground down orientation) or the two slots and the wider of the two shots (wide should be the neutral side - ground on the bottom). You can prove the hot side by measuring to the ground. White wire to ground = no reading. Black wire to ground = 120 volts. (The black and white are INSIDE the electric outlet. You can use either probe to do the measurement.

I hope this helps you.

If you have more question, please let me know.

Thanks for using


Oct 23, 2009 | E-Machines M5309 Notebook

2 Answers

No power to the laptop

You have a malfunctioning powere supply. To test the power supply, you can use an amp meter to check how many amps it puts out to see if it is working ok. Or if you can simply connect it to another laptop with same model if available. These power supply have an output of 19 volts by the way. You can also use another power supply if avialable to see if its indeed the power supply.

Aug 11, 2009 | Dell Studio 1737 Laptop

1 Answer

No power

You need to verify that the power supply is stilll working. Get a volt meter and set to DC Volts and verfiy plug end. See power supply to know what voltage it should be.

Comapq and HP laptops like yours also has problems witht he pluf in the rear of the laptop to seperate from the motherboard and will not allow any DC voltage in. It can be replaced but you will need to buy a new femail power plug and take your unit apart.
Please Check the HP help page here

Jul 12, 2009 | HP Pavilion dv6000t Notebook

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