I NEED TO KNOW HOW TO CONNECT THE POWER SUPPLY FOR AN EMACHINES T1120 COMPUTER. CANNOT FIND A SCHEMATICS DIAGRAM ANYWHERE.

Question edited for clarity. se·man·tics /s??man(t)iks/

1. 
   the branch of linguistics and logic concerned with meaning.

There is some help here for for repairing Dell PSUs, but no schematics.

https://www.google.com/search?q=SMPS+DPS+250AB+power+supply+schematics

You can get new ones on eBay and Amazon

https://www.google.com/search?q=dell+optiplex+790+power+supply

..

Sorry but we have no wiring diagrams.

kinly check this comprehensive manual. it will show you schematics and all the pictures as well as step by step procedure on how to plug it in.

http://downloads.emachines.com/userguides/8512499_E17T6W_E19T6W.pdf

have a great one! i love that machine.

It if is a three pin male "receptacle" with a tab on one side and open on the other, it is in fact a fan connector. Most motherboards have them labeled right on the motherboard as Chassis, CPU, etc.

The smell is the Power Supply.

Typical example of a Power Supply not installed in a desktop computer,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4435072&CatId=106

[ NOTE*
This is not an example of a direct replacement Power Supply for your computer. I would need to know the Model Number of your eMachines to give exact information ]

Bad Power Supply. Weak voltage power rail. (Or rails. There are three main voltage power rails for a Power Supply used in an eMachines desktop computer)

Enough power to light LED lights, and apparently spin fans, but Not enough to turn the Processor on.

Watts = Voltage times Amperage.
One measurement used for measuring the maximum available power output, of a desktop Power Supply, (SMPS. Switched-Mode Power Supply), is to state the Maximum Wattage available.

Typical maximum Wattage available for a typical eMachines Power Supply, usually averages from 150 to 300Watts.

1) ALL of the LED lights on at one time, will use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 Watts of power.
Depends on what Processor it is.

(Note* Intel Pentium II processors use less than 51 Watts)

Solution is to replace the Power Supply.
This isn't as hard as it 'sounds', if you have never performed this procedure before.
I know you can do it.

1) http://www.fonerbooks.com/r_power.htm

2) http://www.videojug.com/film/how-to-install-or-change-my-computers-power-supply

3) http://computer.howstuffworks.com/power-supply.htm

If you need guidance in replacing the Power Supply in a step by step for your eMachines, please post in a Comment. (Believe upper right of your page)

Should you also desire recommendations to compare for a Power Supply, I would be happy to provide them.

Regards,
joecoolvette

Connecting to the computer is straight forward unless it does not work. Check the power supply first outside of that I don't think the schematics are available anywhere. And spare parts are not available items like these are disposable. Unless you’re good with circuit design and figure it out yourself the only option would be to purchase a new sound system

Lilyoungun8, you need to be a little more specific; Check these:

1. Is the power from the mains turned on?
2. Turn it off from the wall socket and push the power cable back in, it may be loose. Then try turning it on again.
3. Hopefully it is none of the below, but if none of the aboe 2 things work, it may be one of these in increasing order of importance:
3.a. Your power cable is faulty - you will need to replace it
3.b. Your PC power supply is shot - you will need to replace it
3.c. Your motherboard has died - you will either need to replace it or buy a new PC altogether.

Do let us know...

- Quirino

If you are replacing the power supply and it has 4 pin 12v conector and your motherboard doesn't, just disregard the 4 pin plug. The 20 pin conector will supply sufficient power for the processor. Many of the older motherboards did not have a separate 12v supply for the processor.

You will have to order this through an authoized RCA dealer Its not old enough yet for general publications from RCA If you call Sherl at TEEVEE Supply at 1-866-207-9824 or [email protected] give them the CHASSIS number NOT the model and they will order you one. You should know my freind when dealing with RCA alsway go by a chassis number! Good Luck