EMachine computer won't power up - light up

Emachine / W3653
August 22, 2009 at 15:25:23
Specs: Windows Vista
Radio Shack technician said motor board was 'gone'. EMachine 'help' gave things to do to see if computer would start. Technician left many wires disconnected so thought wiring diagram might help to comply with EMachine advice.

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August 22, 2009 at 15:48:31
It's motherboard, not motor board & more than likely, the power supply is what's "gone". eMachines is known to use cheap Bestec power supplies which have a high failure rate.

It's pretty tough to get the wiring wrong. All the plugs are keyed a certain way so that they can't be plugged in incorrectly. The board itself takes two plugs...a 24-pin main ATX plug & a square 4-pin ATX12V plug. Each drive takes two plugs, a data plug & a power plug. The video card (if you have one) may or may not require a power plug. The only other wiring is for fans & the case (switches & lights - generally known as the front panel wiring).



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August 22, 2009 at 16:01:18
"Radio Shack technician" Radio Shack has technicians?

"Technician left many wires disconnected..."

The Radio Shack "tech"?

If you look on page 17 of the first link jam provided, you'll see how the front panel should connect. It's usually impossible to
connect most things wrong.


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August 22, 2009 at 16:56:32
emachines computers are well known to have el-cheapo power supplies that tend to fail more often than average, and when the power supply does fail, they are a lot more likely than average to damage something else, often the mboard.
This is especially the case if it's a BESTEC power supply!!

The technician probably tried another power supply with the mboard and found it still won't boot. There's no need to re-connect a dying or dead power supply.

You can probably buy the same mboard for it used off the web for a reasonable price, and get yourself a power supply. The chances are very good nothing other than the mboard is damaged.
HOWEVER - make sure the ad says the mboard has been tested and found to work!
It's best to get the same mboard that was in an emachines system, that has an emachines bios version, because if you get one with a different brand's bios version, you may NOT be able to do the emachines recovery procedure to restore the original contents of the hard drive for your model with (a) Recovery disk(s) meant for that - the program may quit if the bios version is not emachines.

You can look up which mboard you need here:

You can usually replace the power supply with any decent standard sized standard ATX PS with the same capacity or greater.

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:

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.

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Related Solutions

August 22, 2009 at 20:38:12
Wonderful to have found this web site. Will certainly try the adviice given.
A Lee Grimsley, Jr., D.C.

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August 22, 2009 at 20:51:59
'Radio Shack technician' refers to father-son Southern Computers connected with 'franchise'? Radio Shack branch
in Lake City, SC.
Please, how do I find page 17 of 'the first link jam provided'?.

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August 22, 2009 at 20:52:25
It's NOT a good idea to leave your email address anywhere on the web.

You can edit any of your own posts on this site, except the first one if you started the Topic and there's one or more responses, for at least 5 days, by clicking on edit at the top of the post.
You would be wise to delete your email address, not because we who answer would ever abuse using it, but because someone or something else could.

On this site you can ask people to PM (Personal Message) you - if somone does send a PM to you, you will then get an email message that someone has sent a PM to you that has a link to go where it is - you can supply your email address in your PM reply to them if you like.

"Please, how do I find page 17 of 'the first link jam provided'?."

Haven't you looked at pdf documents before?
There is a white box with numbers on it lower left in the bottom bar of the document - click on the > at the right end of it till you get to 17.
NOTE that the pdf pages are not necessarily the same as the page of the document.

HOWEVER that's not your mboard.

If this is a US model,
this says

this is your mboard - ECS 945GCT-M3 (V3.0)

Manual last one on this page

That has the pinout information (which for what goes where on the mboard)

emachines computer case identification:

Case wiring:

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August 23, 2009 at 13:48:24
Thanks so much! Will get back considering progress.

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August 23, 2009 at 15:38:13
By the way, if it does have a BESTEC power supply, I don't recommend you connect it to any other mboard - it may fry that too.
It's okay to connect a working power supply to your mboard, but the technician has probably already tried that.
I'm guessing he didn't charge you anything and that's why he didn't bother to reconnect things.

There is something you can try if you're careful. With the the power supply still connected to at least the drives, (don't plug it into the mboard) use a stiff wire such as an unbent paperclip to short the green wire in the main connector from the PS to any black wire in the main connector - you need to get to the metal ends on the wires - best done from the wire side. If the power supply then starts up, then it might be okay, but that's not 100% sure, and not likely if it's a BESTEC.

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