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Hp nx7000 laptop will not power up and when the power supply is plugged in the power light will flash briefly before going out.

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  • sbalder1 Sep 25, 2008

    Without the battery it will occasionally power up briefly but not long enough to load up.(10 secs max.)



    No warranty so I guess it will be a new board.

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  • 341 Answers

See if it will power up without the battery. If it doesn't you're doomed unless you got a warranty service active. Laptop power supply circuit is embedded into its mainboard. This is why a warranty is needed because mostly they just swap the mainboard.

Posted on Sep 25, 2008

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I cannot turn on the HP Pavillion1450. Green power light flashing at rear.


The power indicator light on the back of the Power Supply flashing when power cable plugged in, indicates a problem with the power supply. There is a short somewhere in the wiring. It will need to be replaced.

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We had a power outage and now my HP m1264n desktop computer will not start. The green light on the back is flashing, but nothing happens when I press the power button on the front. Could it be my power...


the green light on the power supply but it dosnt relay to the mother board,the first item I would nbe concerned with is that the power supply that is,unplug your computer open up the access panel on the tower,the largest plug from the power supply,going to the motherboard unplug it . the plug has a release on it pinch inward and pull up at the sametime this will relaese it, now plug in your computer to the wall power and if your power supply has a switch on it turn it on,also make sure the 240 110 volt switch it's a slide switch on the power supply is on 110 volts if your not in europeits 110 here in the usa, if the light fails to blink or even turn on its the fuse in the power supply,if the light comes on blinking the power supply needs more attention if the light stays on full the problem lyes beyond the power supplyI would guess the fuse is the problem,now youll find two of them within the case of the power supply hope this helps.

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I plug it up and green power light blinks off and on


If the main power light only comes on very briefly then there is a strong chance the power supply is or has failed..

If the fan on the power supply only spins very briefly after it has been switched off for a couple of minutes then that too is an indication of a bad power supply.

Either way that can be easily checked at most computer stores in a matter of seconds. new PSU's are also relatively cheap and obtainable.

If it is the PSU purchase one with a higher rating than your current one.

EG if yours is a 350 watt PSU then go for a 400 watt or higher.

Hope this gives you the information you need

Bob
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Hp Pavilion a1120n will not power up.


Yes it needs a power supply. You can get a cheep one on eaby or get one off of the HP site

Hope this works,

Luke Wilcox

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Won't come on after power outage


Hi,
Sometimes you have to unplug the monitor from the power supply and wait at least 30 seconds before plugging back in, and make sure you don't need to press the reset button on the power strip.

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Advent laptop 7079 suddenly has no power, power adapter light is on


Is there a power indicator light on the laptop? If so , is it on when the adapter's light is on and plugged into the laptop? If not, try gently moving the computer end of the plug on the adapter while it's all plugged in. If the power indicator on the laptop flashes briefly or comes on you have an issue with a loose power connection in the laptop and need to have it serviced . this is a very common issue with laptops that are frequently plugged in and unplugged as the motion promoted lose plugs and solder.
also the laptop could be in hibernate mode and holding the power button on the laptop down for about 7 seconds should wake it.
If still no power i would suspect the power supply and aagain i would take it and have it serviced at this point.. ALWAYS CHECK THE WARRANTEE BEFORE YOU SERVICE SOMETHING YOURSELF
Post again here if i can assist you further
Please rate if this solves your issue

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Power Green Light Flashing HP Desk Top PC m7250n


The 'cure' for this is to replace the power supply.
Inside your power supply are Electrolytic Capacitors. These are Filters for a power supply. To simplify detailing the construction of them, let's just say they are small aluminum 'cans', with an Electrolytic paste inside.

They are used to filter the incoming AC electricity from your house, (Business, school, whatever) They are also used to filter the DC electricity, coming out of the power supply. (Your computer power supply converts AC electricity, into DC electricity)

The one's we're going to concern ourselves with here, are the Output capacitors. The one's that filter raw DC into true DC.

When a capacitor (Of this type) starts failing, it's because Electrolytic paste is developing a gas inside. (Hydrogen gas) The gas expands, breaks a seal, and begins pushing the paste out. (Oozing out)
So much paste loss, and the capacitor can still function, but at a weakened state.

These capacitors deal with the voltage power rail for a power supply. Weak capacitor? Weak voltage rail!

Your processor requires a steady, 'clean', supply of DC voltage. It operates in a very TIGHT tolerance. Too much, or too little, it turns off. Too little it doesn't turn on.

The power surge has weakened Electrolytic Capacitors inside your power supply.
Lights light up. Fans spin. It sounds like the harddrive is running. (It IS! It's just sitting there spinning. More about that to come)

ALL the lights use less than 1 watt. EACH fan uses 2 to 3 Watts. The harddrive just sitting there spinning, uses about 5 Watts.

When it's time for the processor to turn on, (BIOS turns it on), it can't! Processors use 55 Watts to 125 Watts. Depends on the processor make and model.

Your harddrive just is just sitting there spinning, because the processor isn't running.

Solution? Replace the power supply, be happy.

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34 Answers

Power Green Light Flashing HP Desk Top PC m7250n


During a power outage their is a surge when power come back on the grid (surge can be caused by lighting strikes akso). This surge trips the internal procters inside the power supply to protect the Mother Board, hard drive, processor and fans and any device that pulls wattage from the power supply. Since all these power using devices are trying to pull power at the same time to boot the computer back up one ends up with a loop of surge thrugh the power supply with a protective trip, reset, surge again and trip again. This will continue in this loop as the computer is trying to boot all the devices at one time (Mobo, Hd, processor, cooling fans and other devices). Simoly, more power wattage is being demanded than the protectors will allow at one time causing a protective shutdown followed by a restart followe by a protective shutdown in a continious loop.
The normall sequence for a boot is to boot the board, processor and fans followed by a boot of the hard drive, and other boot devices once the board is energised, NOT all devices at the same time, as this results in an overload and trips the protectors. This protective loop is indicated by the blinking light as the power is turned on and then shut down for protection as the wattage pull is over the demand that the protectors will allow.
Blinking light indictes you are in the protective loop.
SOLUTION: 1. Disconnect the Mother Board connector, with the computer unplugged, this will allow the power supply to reset at maximum wattage upon reboot.
2. Disconnect the Hard Drive power connector and ay boot device power supply cables, this will allow the Mother Board, processors and fans to boot without an overload of the protector inside the power supply.
3. Plug in the computer and the indicator light will be solid green indicating that it is reset and out of the loop.
4. With the computer pluged in and the Power Supply fully energised, plug in the Mother Board. The computer will now boot, and the processor fan will come on and the cooling fans.
5. After computer has rebooted, shut the computer back down and connect the Hard Drive power cable and any other power cablis that were unplugged.
6. Reboot with all cables connected and you are up and running again.

POWER SUPPLIES HAVE AN INDICATOR LIGHT FOR A REASON.
REMBER - BLINKING LIGHT IS AN OVERLOAD OF THE PROTECTORS AND ELLIMINATING THE OVERLOAD SOLVES THE PROBLEM AND THAT THE POWER SUPPLY IS WORKING AND CONVERTING POWER.
NO LIGHT MEANS NO POWER OUTPUT AND THAT INDICATES THE POWER SUPPLY IS NOT FUNCTIONING AND NEEDS REPLACED.

Hope this helps everone with power outages and lightining strikes. It is a rather common problem and can also occure when building a computer and one missmatches the power supply with the board wattage needs. If the board wattage needs are greater than the power supply output you will get stuck in a potective loop eventually. WHEN BUILDING A COMPUTER ALWAYS MAKE SURE THE POWER SUPPLY CAN PRODUCE MORE WATTAGE THAN YOU CAN CONSUME AT THE MAXAMUM LOAD.
Have a great computing experiense.

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