rEaLLy? Let me check my schedule................yep, I can fit you in.The eMachines W3400 Desktop PC uses an MSI MS-7145. Also known as the MSI RS480M-IL,
http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=1261749&CatId=1619Starting with an empty eMachines W3400 computer case;Anti-Static Precautions:Your body carries Static electricity. Static WILL fry out (Short Circuit) the delicate hardware components inside a computer.Poof! You probably won't see it, or feel it.(A Processor is the MOST susceptible hardware computer component to Static shock )Computer ON a table, computer unplugged from power, (Bear with me), computer case open;TOUCH an unpainted surface, of the metal frame of the open computer case. 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.Make sure you are relieved of Static -> BEFORE touching any parts, also. Before you take any of them out of their anti-static bags, or cartons. (In case you buy some new stuff)The front of your computer is the Front Panel.The area of contact pins on the motherboard, that the main wires from the Front panel go to, is the Front Panel header.1) Got the pinout for the Front Panel header? Know what pins those wires go to?I don't know of a motherboard manual out there, that is readily available. This is because it is a motherboard made by MSI for eMachines. It is not an MSI O.E.M. motherboard.Going with the Front Panel header pinout for an MSI RS480M, and let's see if it is the same;Motherboard mounted in computer case;Processor to the Top, Ram Memory slots to the Right, 3 white long PCI slots to the Bottom:The Front Panel header is at the Bottom/Right corner. It is actually TWO headers.JFP1 and JFP2.(Junction Front Panel 1, Junction Front Panel 2)8 pins across the Top row, NO pin.3 pins across the Bottom row, NO pin, 5 pins.It is labeled with colored areas around the pins.JFP1 is so many pins, JFP2 is so many pins.JFP1:Starting at the RIGHT side going towards the LEFT; TOP row;NO pin, Pins 8, 6, 4, and 2Starting at the RIGHT side going towards the LEFT; BOTTOM row;Pins 9, 7, 5, 3, and 1.A) Pins 1 and 3 are for the HarDDrive activity LED light.Pin 1 is for the Positive ( + ) wire.If the HDD LED is dim when the Harddrive is active, switch the wires around.B) Pins 5 and 7 are for a Reset switch, IF a Reset switch is used.C) Pin 9 is N/C. Not Connected. Pin is reserved for the factory.D) Pins 2 and 4 are for the Power On LED light.Pin 2 is for the Positive ( + ) wire.If the PWR ON LED is dim when the computer is on, switch the wires around.This is for a Power On LED that has 2 wires.E) Pins 6 and 8 are for the Power On switch. (PWR ON)The next set of pins to the LEFT of Pins 1 and 2 in the JFP1 header, are the pins for the JFP2 header.Starting at the RIGHT side going towards the LEFT; TOP row;Pins 8, 6, 4, and 2.Starting at the RIGHT side going towards the LEFT; BOTTOM row;NO pin, Pins 5, 3, and 1.A) Pins 1, 3, and 5, are for a Power ON LED that has dual colors.Pin 1 is for the Ground wire. ( - ) Pin 3 is for SLED. (Sleep) Pin 5 is for PLED. (Power)B) NO pin 7C) Pins 2 through 8 are for a small speaker. The speaker is for BIOS Beep Codes. Pin 2 is the Ground ( - ) wire. Pin 4 is N/C. Pin 6 is N/C. Pin 8 is for the Positive ( + ) wire.Motherboard:Install the Processor, and Ram Memory to the motherboard, before installing it in the computer case.Why?Because you can see if you have the Heatsink/Fan combo, mounted correctly.Looking at a 'birds eye' view across the motherboard, see if the finned Heatsink is sitting F-L-A-T on the Processor. If not make adjustments.The Top of the Processor, and bottom of the finned Heatsink, MUST be clean. If you are reusing, scrape the top of the Processor off, and bottom of the Heatsink, with a suitable PLASTIC scraper. I use an old credit card. (Yeah, send me sum more in the mail guy's! Lol!)If there is a Thermal Pad, peel it off, fly it at the cat. They are J-U-N-K, and can't be reused anyway.Then use Q-tips dipped in Isopropyl Alcohol. (Rubbing alcohol. 93 percent is best, 70 percent will do. 50 percent = No in my book. 50 percent Alcohol, AND 50 percent WATER)May be a gooey mess, and will take a lot of alcohol dipped Q-tips.C-L-E-A-N!! Clean enough to eat off of.CAUTION!! Isopropyl Alcohol is EXTREMELY FLAMMABLE!Use in a WELL ventilated area with NO sparks or flames present!Put a small pea-sized drop of Thermal Paste, in the center of the top of the Processor. Set the Heatsink/Fan combo down on top. FLAT.From here I am going to give you a link to MSI Support, for the motherboard manual for the MSI RS480M/RS482M motherboard.
http://us.msi.com/service/search/?kw=RS480M&type=productTo the right of the yellow RS480M, click on - Download - in blue.On the next page hover your mouse cursor on the Download tab.(Overview / Specification / Download / etc. In the drop down list click on - ManualUnder the subheading - Download - click right on the blue -E7145v2.1.zipNow click on the country name nearest yours.Make SURE there is a green dot on the small circle, to the left of -Save File. IF not, click in the empty circle to the left of Save File.This is a Zip file. A Zip file is compressed. It is used to send a large amount of information easily. The file has to be 'de-compressed', or 'unzipped'.If you need guidance in doing so post in a Comment.No problem.If you need help along the way, I'm right here. Just post in a Comment. And, oh yeah, I'm 'Windy', as you can see, lol!I try to detail it as if I'm sitting next to you, guiding you.Regards,joecoolvette