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Did you receive a restore CD along with your eMachines computer when you purchased it? If you have such a disk, that is the easiest way to do a full system restore. If you do not have this disk, you can obtain one via emachines support. This is the most recommended method for a full restore. If your machine boots up fine, you can check to see if you have a restore point in the Windows System restore. If you ever had to turn the system restore off (for virus removal or something), you will not be able to to a complete restore this way.
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There are just too many eMachine models to be familiar with every one, however, as a preliminary inspection, remove the side panel, and turn the computer on to see if you see a green "Health" light. This will give you an initial clue as to how to pursue the problem. eMachines have historically had power supply problems. If you do not see a green health light on the motherboard, then your power supply is defective. A power supply supplies various voltages + - 5V, + - 12V ,etc. A power supply can be easily tested by a local shop with the proper test equipment. You might start there if you are a DIY! Short of that, you can purchase a power supply for under $65.00.
if it is powering off like that it usually means that the mobo is bad, look at the capacitors on the mobo. if any of the tops are raised or corroding, it needs replaced. also if you see any part of the motherboard that is darker or orange, it is from a lot of heat, which means that parts may have gotten too hot and melted.
usually for an emachine, the mobo's are usually more than the unit is worth. best solutiong would be to get ready to invest in another unit
Hi hearalso, down to the basic's. Replace power cord.
No help there than, remove the case's side panel to expose the motherboard. (Normally it is the left side panel while facing the front of the PC.)
Look closely for a small (green in color) led light. The power cord must be connected to the PC & connected to you're power strip but do not press the power on button on the PC.
The green led tell's you the board is receiving 5volts. Check all connections. Un-plug & reconnect every data & power connector in your PC. (Double check). There is a fuse inside your power supply that may have blown. Check you're manual page, Approva Statements B-1. Fuse Warning Instruction Caution.
Check fuse in power supply. (Unplug power cord before opening).
If you can not power up the PC after all of the above than if possible, swap out the power supply.
Replacing the power supply is the last step.
If you have more questions, feel free to ask.
Assuming the power supply is ok, and the pc is a few years old, it could be a flat cmos battery so check for the disc shaped 3V battery and see if it's flat.
Whilst you have done that look for the JBAT1 terminal and put jumper on pins 2-3 for a few seconds then back to 1-2.
Look at the capacitors (tube shaped things) for the tops and sides swelling, if so mobo needs replacing.
You need also to check the power supply leads to the motherboard and check its connected to mobo ok.
Start up pc if it will and set the time and date in standard bios settings.