Computer wont boot up,

what makes you think its usb overload ?

Check your computer's power cable and the power cables to any devices connected to the computer. Make sure all cables are firmly plugged into electrical outlets and into the computer and other devices. If you have an extra power cable for your computer, swap it in to see if your computer's power cable is the problem. Remove your computer's battery, if it is a laptop, and connect the computer to a electrical outlet to see if it will start up. Sometimes a discharged battery will prevent a laptop from powering up. If your laptop still won't power up, remove the power cable, replace the battery and try to run the computer off battery power. Unplug your computer and plug a lamp or radio into the same electrical outlet and see if that device works.
If the lamp or radio doesn't work, the outlet is the problem. Unplug your computer and open your computer's case, if it is a desktop system. Look for loose cables, cards and connections and attach them firmly. Blow out any dust with a can of compressed air. Also, check your computer's memory chips to make sure they are all plugged in and seated properly. Close the case once you are done and plug in the computer. Disconnect any USB devices connected to your computer and try to power up the system. Sometimes a USB device not connected properly will stop a computer system from powering on. Disconnect any new devices recently added to your system. Sometimes new devices will conflict with other hardware within your computer and cause an overload on your computer's power supply. Disconnect any other devices connected to your computer such as the keyboard, mouse, monitor, printer or scanner and plug your computer into a electrical outlet by itself. Check to see if the computer works. If does work, shut it down and connect just one device, such as the monitor. Turn on the computer and monitor and see if everything works. Continue connecting devices until you find the one that is stopping your entire system from powering up. Hope it helps.

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replace you ATX casing. the power switch of your ATX is not working..

A) When you hold a Power On button, (Switch actually), in for a count of 10 seconds, it turns the computer off.

(There is a Power On switch, located behind the plastic Power On button. Usually, the Power On switch snaps into the housing of the plastic Power On button.

Example of a typical ATX Power On switch,

http://www.directron.com/atxswitch.html

The Power On switch turns the Power Supply on.

Old computers had a metal rod, that when the Power On button was depressed, the button pushed against the metal rod, which in turn pressed against a power switch located inside the Power Supply.

The design after that, was a power switch located in the Front Panel. (Plastic front of the computer) A large cable, (Wire) ran from the switch to the Power Supply.

Now there is the Soft Power On feature. (PS_ON)

The Power On switch is a small Momentary Contact Switch. Pressing it closes a circuit. The Soft Power On circuit.

When a power supply is plugged into power, there is a constant 5 Volts (DC) present.
This is the 5 Volt Standby.

Closing the Soft Power On circuit, redirects the 5 Volt Standby power to a circuit within the Power Supply.
This in turn 'excites' the Power Supply, and turns the Power Supply on.

Sorry to be windy, but I wanted you to know how the Soft Power On feature works )

eMachines are a budget computer. As such they save the consumer money.
However in order to do this, the manufacturer will install low quality parts, in some areas of the computer.

One such part is the Power Supply.

1) ALL the LED lights combined use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts

3) A typical Processor can use 51 to 125 Watts.
Depends on what Processor it is.
(Had you stated the Model Number I could have told you)

Enough power to spin fans, but not enough to spin fans, AND turn the Processor on.

Do you have access to another computer that is unused, but has a Known to be good, Compatible power supply?
It could be used for a test unit.

Tell me the Series, and Model Number of your eMachines, and I'll tell you what Wattage it should have, and what power cables, for the Power Supply.

(Some examples of Series, and Model Numbers, T1090, E4264, W2925, and so on. The T, E, and W are a few examples of the Series letter.
The numbers following the Series letter, is the Model Number)

If you wish I can direct you in removing the Power Supply, and installing the test unit. (And/Or a new Power Supply)

now, this sort of shut down is difficult to diagnose on remote, i would suggest downloading your motherboard manual beforehand. before you do anything, i would suggest read in manual where is reset pin and how to reset bios to original state, but do not do that yet, it will lost all your mods settings and return m/b - bios to original state. there are several possible causes of that fault.

1. faulty memory stick
2. thermal or fault on power supply
3. thermal or fault on motherboard
4. corrupted bios

we will start with easiest to check re 1.
a. switch off your computer,
b. remove power cable from power supply,
c. remove side wall,
d. remove memory sticks and replace them with known working ones from another computer
e. reconnect power supply and switch computer on, if computer works correctly, you solved your problem and need to replace memory sticks

power supply is not much more difficult re2.
a. switch off your computer,
b. remove power cable from power supply,
c. remove power supply cables from motherboard and all accessories, do not remove power supplly from it's craddle yet
d. connect cables from new power supply to your motherboard and processor fan, connect them to your hdd and cdrom,
e. connect power cable to new power supply and start your computer, if computer run correctly, switch it off, remove old power supply and replace with new one

most tiddly bit... when you arrive here that meant that previous two did not solved your problem, re 3:
a. switch off your computer,
b. remove power cable from power supply,
c. disconnect all cables from your m/b
d. connect power supply to m/b and processor fan
e. connect ps2 keyboard
f. connect monitor if "all in one" m/b, video card and then monitor in any other case
g. insert power cable to power supply
h. switch on your computer
i. acess bios (that is usually done by tapping "delete" key, find in your manual) if possible, if not then:
i1. switch off power supply
i2. remove power cable from power supply
i3. re-set bios (you need to locate reset pins/switch/button on you motherboard in manual)
i3. reconnect power supply cable \
i4. switch on the computer
j. acess bios and set your thermal to 75centigrade or 80 centigrade and 5min
k. close bios saving changes
l. re-boot your computer and leave it for 10min, if computer still run, that will indicate your problem lies elsewhere.

checking auxiliaries:
a. switch off your computer,
b. remove power cable from power supply,
c. connect cd-rom
d. reinstall power cable and re-start your computer
e. allow 10min run and check if computer is still running

switch off. remove cable and connect your hard disk drive, run or switched off? if off, you need to check your hdd...

any other auxiliaries need to be connected again in steps and if finaly you find one which terminated boot up, this meant that this particular element is responcible and need replacing. you need as well consider that your power supply maybe perfect on the bench, but will be too small for load required adn simple upgrade to more powerfull mother board can solve the problem.

hope that half book on problem solving solve yours :-)

unseat and reseat the memory one stick at a time in each slot one at a time,

Also make sure the switch on the back of the power supply is set to 115v if your in the U.S.

With the power supply make sure only the connector to the motherboard is connected. This will make sure there isn't any other device shorting out the motherboard. Also make sure the monitor is connected. If needed try another known working monitor.

If after these steps you still don't get video then either the power supply or the motherboard is bad.

Check power Supply as it might have shortened the power, Open the case and remove the big white power lead from the motherboard (this is clearly visible as all the colored leads re and yellow from the power supply - normally a P4 feed into the socket).
Unplug this, find another power supply and using the big white cable connect this to the motherboard and try powering the machine up with that.
If works - great just replace all power cables from the power supply in your machine with the ones from the working one (not forgetting to remove the old power supply from the computer and replacing it with new one).

This should work

This can be due to several things and usually its the last change you made. When you try to turn it on, do you see the fan moving on the power suppy (rear of computer) If this fan is not on I would suspect the powersupply. A power supply can give you a lighton the front and not supply enough power to start the computer.
Next i would remove the cover of the computer (usually two or three phillips screws on the back) and physically inspect all the cables and add-in cards and make sure they are all fully in thier sockets.
If you have added memory recently, a wrong voltage or speed could cause a non-booting system.
check these things and post again if this doesnt help .
These are only a couple steps , but the first steps you should take after trying to boot into safe mode unsuccessfully .
There will be more to check if this does not work, so dont rate untill we solve the issue..

Issue: No power or computer does not turn on.
Cause: No power from the computer can be caused by any of the below possibilities.

1. Connections not connected properly.
2. Third-party hardware.
3. Bad power cable.
4. Incorrect power supply.
5. Bad battery.
6. Bad power supply, power button, and/or power board or inverter.

Solution: Note: If the computer is turning on but is not (beeping) or giving any type of picture on the display. If you are uncertain if the computer is turning on or not, this can be easily checked by locating any fans in the computer or visible from the outside of the computer. If these fans are spinning, the computer is receiving power and this document may not apply to your issue. Connections not connected properly Verify that the power connection is connected properly to the wall and the back of the computer. If the connections appear to be connected properly, attempt to disconnect and reconnection both ends of the cable. If you have a power strip (surge protector) or switch used to turn everything on at once, temporarily disconnect the computer from that switch and connect that cable directly to the wall. This will help verify that the strip or switch is not bad. Verify that the outlet works by connecting a different component to that switch. Third-party hardware : (If )additional hardware has been recently added to the computer it is recommend that you temporarily disconnect that device or devices from the computer to verify they are not preventing your computer from turning on. Bad Power cable : Verify that the cable supplying your computer is not bad or damaged by using another power cable. If you have a standard crt modem this cable can be used in place of the computer power cable. If you have a portable computer or laptop, when the cables are plugged into the laptop you should see a power light or battery charge light. If this light is seen, this is a good indication that the power cable is good. Incorrect power supply If you are building your own computer or if the computer has never turned on since you purchased it, it is possible you are using a power supply that does not supply enough power and/or the incorrect type of power supply. Verify your power supply meets the requirements of your motherboard and processor. Bad battery If your computer is a laptop or portable computer that utilizes a battery for mobility it is possible that the battery may be causing your issue.

• If your computer powers on when the cable is connected to the portable computer but not when it is disconnected, we recommend you purchase a new battery.
• If your computer does not power on when the battery is connected and when the power cable / charger cable is connected, try removing the battery and seeing if the computer can power on with only the power cable connected. If no power is still received, skip to the final section.

Bad Power Supply, power button, and/or power board or inverter If, after following the above sections, your computer still receives no power, it is likely that a hardware component in the computer has failed. It is most likely that the power supply has failed. If you do not plan on replacing the power supply yourself or if you have a portable computer, we recommend having the computer serviced by your computer manufacturer or a local computer repair shop. If you have a desktop computer and plan on trying to repair the computer yourself, we recommend you replace the components in your computer in the below order.

1. First open the computer and verify the power connections. You may also wish to consider disconnecting the main power cable and reconnecting the power cable to make sure it has not become loose. Also verify the power button cable is correctly connected to the Motherboard.
2. Replace the power supply with a new power supply.
3. Replace the motherboard.

Hope this helps ya/Please dont for get to Vote.Thank You

It states you are not getting no power on your lap top computer :

No power or computer does not turn on Cause: No power from the computer can be caused by any of the below possibilities.

1. Connections not connected properly.
2. Third-party hardware.
3. Bad power cable.
4. Incorrect power supply.
5. Bad battery.
6. Bad power supply, power button, and/or power board or inverter.

Solution: Note: If the computer is turning on but is not posting (beeping) or giving any type of picture on the display, please see document CH000607. If you are uncertain if the computer is turning on or not, this can be easily checked by locating any fans in the computer or visible from the outside of the computer. If these fans are spinning, the computer is receiving power and this document may not apply to your issue. Connections not connected properly Verify that the power connection is connected properly to the wall and the back of the computer. If the connections appear to be connected properly, attempt to disconnect and reconnection both ends of the cable. If you have a power strip (surge protector) or switch used to turn everything on at once, temporarily disconnect the computer from that switch and connect that cable directly to the wall. This will help verify that the strip or switch is not bad. Verify that the outlet works by connecting a different component to that switch.
Third-party hardware If additional hardware has been recently added to the computer it is recommend that you temporarily disconnect that device or devices from the computer to verify they are not preventing your computer from turning on. Note: If the computer was working fine before you added the new hardware, removing the third-party hardware did not resolve the issue, and the computer is not beeping but is turning on, please see our POST troubleshooting document CH000607.
Bad Power cable Verify that the cable supplying your computer is not bad or damaged by using another power cable. If you have a standard CRT monitor, this cable can be used in place of the computer power cable. If you have a portable computer or laptop, when the cables are plugged into the laptop you should see a power light or battery charge light. If this light is seen, this is a good indication that the power cable is good.
Incorrect power supply If you are building your own computer or if the computer has never turned on since you purchased it, it is possible you are using a power supply that does not supply enough power and/or the incorrect type of power supply. Verify your power supply meets the requirements of your motherboard and processor.
Bad battery If your computer is a laptop or portable computer that utilizes a battery for mobility it is possible that the battery may be causing your issue.

• If your computer powers on when the cable is connected to the portable computer but not when it is disconnected, we recommend you purchase a new battery.
• If your computer does not power on when the battery is connected and when the power cable / charger cable is connected, try removing the battery and seeing if the computer can power on with only the power cable connected. If no power is still received, skip to the final section.

Bad Power Supply, power button, and/or power board or inverter If, after following the above sections, your computer still receives no power, it is likely that a hardware component in the computer has failed. It is most likely that the power supply has failed. If you do not plan on replacing the power supply yourself or if you have a portable computer, we recommend having the computer serviced by your computer manufacturer or a local computer repair shop. If you have a desktop computer and plan on trying to repair the computer yourself, we recommend you replace the components in your computer in the below order.

1. First open the computer and verify the power connections. You may also wish to consider disconnecting the main power cable and reconnecting the power cable to make sure it has not become loose. Also verify the power button cable is correctly connected to the Motherboard.
2. Replace the power supply with a new power supply.
3. Replace the motherboard.

Good Luck,Please dont for get to Vote,Thank You