Looking for manual for rs480m motherboard

Look on page 2-20 in this manual:
http://download2.msi.com/files/downloads/mnu_exe/E7145v2.1.zip

Most Motherboards are made to only accept certain plugs in that specific spot! If you are trying to add something new like a new Fan or LED, or HHD and you need power you would have to use a 4 prong plug off the power supply, If your power supply does not have any more available plugs, Amazon.com or Newegg.com sells splitters!

Good Luck and Best Wishes!

On a Asus motherboard its not designed for eMachines systems because they come with a proprietary setting on the case. So what you need to is take the emachines motherboard that you took out and take the new motherboard that you bought and match the two. If there is a difference then you need to return it or buy a new case and you shift all the hardware from the emachines to the new case. If not buy a similar replacement board from emachines or ebay and you can find one and buy it. The Power setting is on all motherboards but some are different then others.

it should be printed on the motherboard itself. if not, go google emachine t6520 front panel connections.

After reading an article about Emachines awhile back, I found out the reason you can't find the schematic- it isn't available, as some motherboards are made specifically for Emachines and therefore not distributed, as they might normally be, but again, others are, but you have to identify them and go through another source to get them- Emachines, appartantly, will not supply them. All is not lost, however...all motherboards have, basically, the same hookups and connectors for the power supplies, hard drives, etc.- they are standard. I found a web blog that explains the power switch, reset, and power led, which will help. Here it is: http://www.computing.net/answers/hardware/emachine-power-sitch-wiring/56545.html
This site will explain about the 24 pin connector from the power supply
http://www.tomshardware.com/forum/53750-7-installation-manual-rs480m-w3400-emachine-motherboard
If you google "motherboard wiring" you will find sites that have illustrations of the motherboard, and explain which connectors go to which sockets, and how to identify them.
With a little patience and determination, you should be able to hook everything up from the various blogs on the net. Hope this helps.

The manual for your computer is available from emachines, p.168 shows the info you need (replacing the front I/O panel)
http://downloads.emachines.com/userguides/8511279_eM_NG3_chassis_HW_ref_en.pdf

The good news is that you can't harm the computer by connecting the wires wrong and the bad news is they just won't work the way they are supposed too if not connected properly. The LED's must have the correct polarity to work.
In general, if you look real close (as in magnifying glass and flash light) you will see the ID for each set of pins is printed on the motherboard (pwr,rst,HDD,pwr sw,speaker) Just match what it says on the motherboard to what it says on the wires. Don't worry if you get the polarity wrong. If a light doesn't work just swap the two wires. The colored wires should be positve (+), though. The reset (rst) and power switch (pwr sw) wires don't require polarity.
These instructions are for most computers in general, YMMV.

The motherboard in your computer is an MSI MS-7145, which is also called RS480M. You can download a copy of the manual here. The front panel connections are on page 2-20.

Looking at the header JFP1, pins 1 through 9 (odd numbers) are the front row, pins 2 through 10 are the back. Pin 10 is the missing pin. The power switch connects to pins 6 and 8. The power LED connects to pins 2 and 4. The HDD LED connects to pins 1 and 3. The reset button, if used, connects to pins 5 and 7.

see to the front panel section on mother board possibly on the right hand side of bottom u can see the label there to connect hdd led

these normally go at the front of the motherboard if you are looking at it where the power supply box cables are at the back. There are litlte pins that these fit onto that will say on the motherboard Hdd led etc... in small writing.

hope this helps

they have to be plugged in horizontally although it is possible to plug them in vertically because the pins are evenly spaced either way. they are color coded just not like you would expect for example one plug has a green wire and a white wire the green side goes to the green pin and the white side goes to a green pin with a white cross you have to look close because there are several green pins which is what threw me off do this with all three plugs