Computer isn't starting up

Turn off PC, Unplug PC from power. Open PC case. Examine all fans including CPU fan and heatsink. clean the fans and heatsink. With case open but everything inside connected properly, Plug pc back in. Power up the PC and check that all fans are running. If not replace fan that is not running. Place PC in a well ventilated area when operating. I use a new small paintbrush for cleaning dust from inside of PC.

LOL, some fans will not shut off, this is normal in some case. But, to be sure your system is not running real hot to keep the fan running try this:
Remove the Power Cord, Remove the Case and take a can of compressed air and blow out dust from the computer's vents and all inside the computer. Also blow out dust from around the power supply and fans.

If it still runs all the time you can remove the fan that sits on top of the cpu and heatsink and clean the dust and apply a fresh coat of Thermal Paste to the CPu and HeatSink.

The first thing I look at when dealing with an eMachines desktop computer, is to see;

1) If it is dirty inside.
If the cooling system is clogged up with 'Gunk' the Processor will overheat. Too many times of this causes major problems.

Air is drawn into the front of the computer, and expelled out of the back. The air flow cools the computer hardware components inside the computer.

Hardware components such as the Processor, graphics chipset, motherboard chipset, Ram Memory, and Power Supply.

If the cooling system is clogged, the cooling capacity drops tremendously.

Computer on a table, computer unplugged from power, computer case open.
Observe Anti-Static Precautions.

[Anti-Static Precautions:

Your body carries Static electricity. Static WILL fry out (Short Circuit) the delicate hardware components inside the computer.

Computer on a table, computer unplugged from power, computer case open, TOUCH an unpainted surface of the metal frame.
This action will relieve your body of Static.

Should you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return ]

Use a can of compressed air for computers. Attach the plastic straw provided to the nozzle. Break the plastic lock tab off of the top of the nozzle. (Used for shipping)

Place the straw tip in the upper left corner, (Inside), and spray air across to the upper right corner.
Squeeze the trigger in all the way as you start, let go of the trigger as you reach the other side.

Drop down a space, and spray across again. (You can watch the cleaning action of the air spray, to determine what the space drop should be. It isn't critical for the spacing. Just what you determine to be best)

Keep dropping down a space, and go across in rows.

Pay special attention to the Fan sitting on the finned Heatsink, (Which sits on top of the Processor), and the finned Heatsink.

Example of an average Fan/Heatsink combo,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=578161&CatId=795

Left-click on the Fan/Heatsink photo to enlarge.

The Fan's blades, center hub, and surrounding cage (Shroud) need to be clean.
I use Q-tips to stir the dust, then follow with compressed air. You don't need to remove the dust, just break the 'crust' so the air can remove it.

(Where the fan blades meet it's center hub, needs to be clean also)

The fins of the Heatsink need to be clean. In-between the fins, and on the outside of the fins.

The Power Supply is the rectangular shaped 'box' at the upper back of the computer. This is where the power cords plugs into. It has ventilation holes in it's case.

Example of an average ATX power supply,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4435072&CatId=1483

The side shown with ventilation holes is the outside of the Power Supply. The opposite side you'll see from inside the computer has ventilation holes also.

Hold onto the plastic straw with one hand, and the can of air with the other. Insert the tip of the plastic straw about an inch inside a top ventilation hole, on one side. (Front of Power Supply, inside the computer)

Spray air, then move to another upper ventilation hole. Now move down, and go across using the ventilation holes. Finally shoot air in the bottom ventilation holes.

Move to the Back of the Power Supply, (Outside of computer at the back), and clean the Fan, it's surrounding cage, and shoot air into the ventilation holes of the Power Supply.

When you are satisfied the computer is clean, let it set for 5 minutes or so.
Allow any moisture that may have developed from using the can of air to dissipate.
Plug the computer into power.
WAIT 1 minute. Turn the computer on.

The second thing I look at is an eMachines power supply.
eMachines are budget computers. Nothing wrong with that, but the manufacturer saved money by installing low quality power supply's.

I replace the Power Supply with a KNOWN to be good, Compatible unit, for a test.

Main problem for desktop computers is they are dirty inside.
Next in line is a bad Power Supply.

A bad Power Supply (Weak voltage rail) will cause all kinds of software problems. It isn't a software problem. It is a hardware problem.

If you state in a Comment as to the Model Number of your eMachines, I may be able to give you a link for opening the computer case. (It's on the back of the computer tower next to the Windows product key)

Regards,
joecoolvette

if that's the error mesage you'll probably need to replace the CPU fan, assuming that's Fan 1. Another option is to open up the PC, and dust it off with a brush of some kind, especially the fans on the CPU, graphics card and power supply.

right click on the desktop click on properties select the screen saver option in this option u can see the power option and selcet never option of turn off hard disk and standby options.

A) Processor fan speeds up to cool the Processor.
Gaming, a video, and uploading requires more Processor 'power'.

A Processor has a Thermal Limit. A temperature it can reach, and no more.
Going past this thermal limit would burn the Processor up.
The Processor fan speeds up, to keep the Processor below this thermal limit.

(If the Processor temperature exceeds the thermal limit, the Processor is turned off. BIOS turns it off)

The Processor fan is usually one of two methods used.

1) A fan sitting on top of the Heatsink, which sits on top of the Processor's case,

Typical Heatsink/Fan combo,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3451342&CatId=493

2) A computer case fan in the front, that pushes air through a plastic shroud, which envelopes the Heatsink, sitting on top of the Processor.

Perhaps the fan's bearings are going out.

Bad fan bearings will let the fan shaft tilt to one side, and the fan's center hub will scrape on the fan motor.

This can cause a whining sound.
(Goes for examples 1 and 2 above)

Computer unplugged from power, Anti-Static Precautions observed, see if you can gently rock the fan's blades up, and down.
NO perceptible movement should be observed, nor felt.

If so this fan needs to be replaced.

If the inside of the computer is dirty, the added 'Gunk', (Dust, dirt, hair, you name it), will cause the fan blades to be unbalanced.
This will make the fan tilt to one side also.

Computer unplugged from power, Anti-Static Precautions observed, computer case open, use a can of compressed air for computers, and clean the inside of the computer out.

May require two cans.
May also require that you use Q-tips to disturb the outer layer of the 'Gunk', so that the can of air can remove it.

(Would also like to add:

The can of compressed air for computers comes with a plastic 'straw'.
The straw is attached to the nozzle of the can of air, when using it.

A Power Supply should have the inside of it's case cleaned also.
The cooling components for a Power Supply, are it's fan, and internal Heatsink's used inside.

http://en.wikipedia.org/wiki/Switched-mode_power_supply

[ Typical construction of a Heatsink is a plate of metal, with tall, thin fins protruding from it.

The plate of metal absorbs heat from whatever object it is placed against, and the tall, thin fins absorb heat from the plate of metal.

The tall, thin fins then radiate the heat away.

If a fan is used in conjunction with a Heatsink, (Such as a Power Supply, or Processor), the air flow from the fan helps to carry heat away from the fins ]

When the fan blades, center hub, and surrounding shroud are coated with Gunk, and the Heatsink's inside a Power Supply, their cooling capacity drops TREMENDOUSLY.

This causes the Power Supply to overheat.
Heat = Wasted Energy.

The Power Supply strains to keep up with the call for power, and eventually cannot.
Components inside the Power Supply fail, and the Power Supply fails.
(As in Kaput)

The Power Supply's case has ventilation holes, on the case side inside the computer.
The plastic straw of the compressed air for computers, is inserted into the top ventilation holes, and air is shot in. (One ventilation hole at a time)

The straw is aimed in a slightly downward fashion.
Then the straw is used in the lower ventilation holes, and then on the bottom ventilation holes.

HOLD onto the plastic straw with one hand, and the compressed air for computers with the other hand.
The straw can shoot off of the can of air's nozzle, and wind up inside the Power Supply's case.

This = NO

No go to the back of the Power Supply, and use Q-tips to get into the crevice where the fan blades meet the center hub.

Also on the edges of the blades, and the surrounding shroud around the blades.

You just need to disturb the outer layer of Gunk, so the air can remove it.
Shoot air past the fan into the Power Supply case also.

You won't get the inside of the Power Supply perfectly clean, but you will extend the life of the Power Supply greatly.

The inside of the computer, and the inside of the Power Supply, should be cleaned on a regular basis as needed.

Different scenarios require more frequent cleaning, or less frequent cleaning.
Only you will know, when you check inside your computer on a regular basis.

You can be the best housekeeper in the world, but even in pristine homes, and businesses, the inside of a computer, (And Power Supply), gets dirty.

(Carpet deodorizer can clog a computer too. It's a fine dust)

If the inside of your computer is kept pristine clean, and you have No fan bearing problems, then your Harddrive is on it's way out.

This explains the workings inside a Harddrive,

http://computer.howstuffworks.com/hard-disk.htm

(The Spindle motor's bearings are going bad )

This is one program, http://www.almico.com/speedfan.php

Would like to state though, be sure the fan in question isn't spinning at a high rate, due to a fault within the computer.

1) Computer is dirty inside.

A) Fan for the Processor, and Heatsink on the Processor, are dirty, causing the Processor fan to operate at a high rate.

[Some computers have a fan mounted directly on top of the Heatsink, sitting on the Processor.
Some computers use a computer case fan to push air through a plastic shroud, which envelopes the Heatsink.

Typical Fan/Heatsink combo,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3451342&CatId=493 ]

Computer unplugged from power, Anti-Static Precautions taken, use a can of compressed air, (Or two if needed), to clean the inside of the computer.
Don't forget to clean the inside of the Power Supply.

[Using the plastic 'straw' provided, (Should be used at all times), insert the straw into the ventilation holes of the Power Supply's case.

Suggest starting with a hole located towards the top of the Power Supply's case, and directing the air flow towards side to side, and top to bottom.
Then move towards the bottom ventilation holes.

Come towards the back of the Power Supply, and clean the Fan's blades, and center hub. Also the surrounding shroud around the fan's blades.

If you find heavy 'gunk', (Dirt, dust, etc.), that the compressed air won't remove, suggest you use Q-tips.
You don't have to remove the 'gunk' with the Q-tips, just 'disturb the surface' of the gunk with them.
Then follow with air.

2) Thermal paste in-between the top of the Processor's case, and the bottom of the Heatsink, has dried up, or partially dried up.

Another situation that causes the Processor to overreach it's thermal limit, and cause the Processor fan to operate at full speed.

Computer unplugged from power, Anti-Static Precautions heeded carefully, the top of the Processor's case, and the bottom of the Heatsink are cleaned THOROUGHLY, and then new, fresh thermal paste is correctly applied.

3) Some fans have four wires.

A) One for the Positive connection,
B) One for the Ground, (Negative) connection,
C) One for the sensor that monitors the RPM, (Revolutions Per Minute) of the fan,
D) And the last wire is a sensor wire, that allows the computer to vary the RPM's of the fan's speed, as needed.

Ensure that the connection of all four wires is tight, and especially the sensor wire connection. A loose connection will cause an out of control fan speed.

Some programs, such as an intensive game, will cause computer case fan/s, and a Processor fan, to operate at high speed.
A necessary thing to keep the Processor from overheating.

For any questions you may have regarding what I have stated above, please post in a Comment.
Would appreciate hearing back from you.

THIS SHOULD HAPPEND WITH RAM PROBLEM REMOVE THE RAM ONCE AND CHECKOUT THE SLOTS ONCE CLEAN THE RAM WITH COTTON CLOTH THEN INSERT PROPERLY IF IT IS NOT WORKING TRY ON OTHER SLOT ON THIS ALSO IT IS NOT WORKING THEN YOU SHOUL CHANGE YOUR RAM 

Try cleaning the fan and the inside of the computer really well with compressed air. Dust can reak havoc inside of a computer and cause slow downs and crashes. It also causes more heat thus causing the fan to spin faster. I wouldn't worry about damaging the computer by removing the case, just remember to unplug it and touch the frame of the computer before anything else. This will discharge any static that CAN destroy the computer.

That the cooling fan is not functioning properly