Emachine T2742 - Will not power on

First Pull cmos cell from motherbord for 10 minutes because sometimes low voltage of cmos cell creates this problem .
After remove cmos cell from motherbord for sometime your bios settings goes to defaults.
Then check.
Also check that smps is work fine .
It is square box on back side of cpu .
Reattch ATX power connector from smps to motherbord.
Also make sure that motherbord surface not touch the cabinet.Check motherbord in outside of cpu .

Let me know if you need more assistanse.
Thanks.

hiya heres a good diagram for what you need


http://scienceaid.co.uk/physics/electricity/images/plug.png

hope it will help you

well this would be more simple for me since i have more than one pc so first thing i would do is try another power supply if that wont turn it on then i would say mobo, the PSU's of the emachines are **** and dont last too long...
well i would try the PSU first since its cheaper.
good luck

have you try to test your power supply if it actually works? try 2 remove it from your pc plug the power chord on it and short the GREEN and BLACK wires using a pin or any conductor u can use. see if it turn on lights and fan turns on when you do that.

Hi dallasblue08,

Here's a diagram of what your looking for:

The following eMachine models share the same motherboard (and thus the same front panel layout):
T2742 T2796 T2798 T2824 T2885 D2823 T2862 T2896 T2898 T2958



Hope this helps!

Mark

gtater,
It's ironic that you ask me this question today-- i am just now carrying in another eMachine computer to fix. Anyway, unfortunately I do not have one that is the same model as yours (T2742). However, I did some quick research and found that yours has the same exact motherboard as the T2898 which I made the diagram for!

The following eMachine models share the same motherboard (and thus the same front panel layout):
T2742 T2796 T2798 T2824 T2885 D2823 T2862 T2896 T2898 T2958



For further reference, I would like to share this diagram for the eMachines T6544 in case someone else may need this model. This is the computer I just carried in... might as well share.

By the way, the power switch doesn't need to be oriented any particular way (positive and negative), which is why the switches are not labeled as + or -. Switches can be wired either way and they will work the same.

Hope this helps.

There are just too many eMachine models to be familiar with every one, however, as a preliminary inspection, remove the side panel, and turn the computer on to see if you see a green "Health" light. This will give you an initial clue as to how to pursue the problem. eMachines have historically had power supply problems. If you do not see a green health light on the motherboard, then your power supply is defective. A power supply supplies various voltages + - 5V, + - 12V ,etc. A power supply can be easily tested by a local shop with the proper test equipment. You might start there if you are a DIY! Short of that, you can purchase a power supply for under $65.00.

First, Check your ram. If not seated, it will not power up. Also, do you hear a series of beeps or not? Need a better & more exact description of problem and what occurs

The diagram for that 9 pin J9G1 is alongside the CMOS battery.

Could be a power Supply fail. It is well known in the trade that Emachine power supplies are very poor. A new power supply is easy to fit and cheap.