As with every Monday we try and post an answer to common computer issues.  this guide will walk you through the basic trouble shooting tips for computer that will not turn on.

 Computer Will Not Turn On

If this is a Desktop read the following.  If this is a notebook Jump to 2.

For desktop copmuters that do not turn on you first need to determine if the power source from the wall is working.  Plub in a lamb or other electonic device into the socket.  If the light turns on then you no you have a good electric power source.  If the light does not turn on then the outlet may have a short and it is not your computer.

Now that you know the outlet is good try pluggin in the computer again and press the power button.  If you are still getting NO lights or sounds when hitting the power button then keep reading.

Check the voltage on the back of the computer.  It should be reading 115 and not 220.  It is normally a red switch.  Flip it over to 220 and then back to 115.  Try turning your computer on.  If it works great if not keep reading.

Try a different power cable.  It’s rare but in the last 15 years of repairing computers I have come across a few of these being bad.  Many monitors use the same type of conector.  If it does not look aorund your house chances are you can find a different cord that will work.  Still no luck!

If that did not solve your issue you will have to pop the case from the computer.  You will see your power supply conected to the motherboard.  Make sure your computer is unplugged at this time.  Now unplug the P4 cable and the Large 20 pin or 24 pin cable.  Check the power supply and see if there is a reset button. Most do not have one.  Gateway does and a few other models but most do not.  Now re-sead the P4 and the 20 or 24 pin cable.  Try turing the computer on.  If it works great if not you power supply is bad and needs to be replaced.

The average cost of a power supply is around 60 bucks for a good one.  If you own a Dell computer you will need to order one from them as they have pripriatary devices.  DO NOT use a regular power supply for Dell.  Yes it will fit and yes it will Fry your board.

For all other models almost any power supply will do.  The power supply is only held in by four screws in the back.  Make sure you disconnect all the connectors and pull the power supply out.  You will see a Watt number on it like 300W or 350W.  Ensure you get one that has at least that wattage if not more.  Also take a look at the big plug.  Count the pins.  If it is 24 pins ensure you buy a power supply that is 24 pins.  Look at the connectors to the hard drive and optical drives.  They may be Sata or IDE.  If it’s a skinny black end then you will need to ensure you purchase a power supply that is Sata.

when installing the new power supply ensure you plug the P4 back into the mother board.  This is the most over looked mistake most people make when connecting a new power supply.  Once installed turn the computer on and you should be good to go.

If you still do not have power  (Unlikely) then just return the power supply and take your computer to a shop to be tested.  If it’s not the power supply then it probably is the mother board board at this point.

2.  Computer will not turn on LAPTOPS Section

If you computer does nothing at all when you hit the power button chances are one of three things are happening.  It may be more then just one of them
1.  Your battery is dead.

2.  You power supply is dead

3.  The DC power jack is bad.

Key things to remember here is you computer did NOTHING when you turned the power button on.  If lights came on at all this guide is not valid for you.

Take the battery out of the computer.  Does it have a button you can push to test the charge.  Many HP models have this.  If not set it to the side.

Plug the power coard into a KNOWN good power outlet.  Does the light on the power supply box turn on.  If not then you have a bad power supply and most likely your battery has been drained and now your computer has no good power source.

Try and find a friend that has the same or similar model and use their battery for testing.  If it works then plug in the power cord and see if the power cord charges the battery.  Most likely it will not because the light never came on to the power supply cord.

If you power cord light did turn on then plug it into the notebook with out the battery in.  If your computer does nothing at all when you hit the power button one of two things are most likely the cause.  Bad DC power jack or bad mother board.

Once again in this senario find a friend with the same battery that is charged.  If his or her battery works then you know it has to do with the board or DC power jack.

It’s all that simple.  The DC power jack is not something most people can repair themselves.  It involves soldering the DC port onto the motherboard.  The other repair is to just replace the mother board.  Doing this will solve both issues.  If it’s the board then your issue is solved because you now have a new one.  If it the power jack your issue is solved bacause you have a new one with your new board.  Replacing the mother board on a notebook is something that takes skill as well.

The average cost to replace a DC power jack is around 229 and the cost for an average mother board for a notebook varries widely.  Expect no less then 350 dollars for that one.

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