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- determine whether the bios Setup is detecting your hard drive(s).
- look for the title Hardware Monitor or similar - the present readings for what is supposed to be +5v, +3.3v, and +12v should be within 10% of 5.0v, 3.30v, and 12.0v
If any are not, you need to replace the power supply. If any readings are more than 10% over, the mboard or other components will be DAMAGED, sooner or later.
Your problem is a frequent problem for an emachines desktop computer.
emachines desktop computers are well known to have el-cheapo power supplies that tend to fail more often than average, and when the power supply fails completely, they are a lot more likely than average to damage something else, often the mboard.
If you have not been fiddling inside the computer case just before this happened and have not changed the ram installed in it, it is very likely that if you replace the power supply BEFORE it fails completely, doing that will restore your system to working properly again.
Unplug the cord to the computer, or otherwise switch off the AC power to it, open up the computer case, and find the label on the power supply - if the brand is BESTEC, I advise you, if you find ANY indication the power supply might be in the process of failing, DO NOT try booting the computer anymore ! If the PS fails completely there is a strong likelyhood it will trash your mboard!!!!
If you have NOT been doing anything inside the case just before this happened, a BESTEC power supply malfunctioning or failing is the NUMBER ONE reason an emachines desktop computer fails to boot normally !
Failing power supplies are common and can cause your symptoms.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
Check your PS.
See response 4 in this:
Since the BESTEC power supply may have already damaged your mboard, if you can borrow someone else's power supply temporarily, try connecting that to your mboard FIRST before you buy a new power supply.
DO NOT replace the power supply with another BESTEC one!
In most cases you can replace it with a standard sized standard ATX power supply.
Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.
Don't buy an el-cheapo PS.
See response 3 in this:
I no longer recommend Cooler Master, AOpen, or Sparkle power supplies.
A frequent mistake people are making these days is they have installed a video card their power supply hasn't got enough capacity to support.
Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD!)
You can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements.
If the power supply does not have enough capacity (more than 50 watts under the recommended wattage) , the video card often works fine at first anyway, but the PS is overloaded 100% of the time the computer is running and the PS is damaged and will eventually fail completely.