Question about AOpen AX45-V (91.88I10.004) Motherboard

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Installing a new power supply

Yes my problem is installing a new power supply on a emachine (t2742 series) the model number of the power supply is atx-250gu. we have 3 chords left and no ideam where they go.. they are as follows, power s/w, power led, and hdd led. i have searched for manuals, and diagrams on line, but nio luck

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  • Anonymous Mar 28, 2014

    A-Open XC Cube EZ - 15.310 Led #1 flashing on motherboard and seems like power supply is trying to power up, but then cycles back down, and this happens over + over without the computer actually powering up all the way. Any help or tips would be greatly appreciated.

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Those are the cables that connect to the motherboard from the power switch, to the power LED and the hard drive activity LED.

Try following the diagram on the following page to know where to put them in:
http://www.fixya.com/support/p365479-aopen_ax45_v_91_88i10_004_motherboard/manual-16477/page-29

Posted on Dec 25, 2007

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2 Answers

When the computer on/off button is pressed , the CPU fan and tower exhaust fans start running, the blue light around the power button does not light and the boot up process goes no further. Fans continue...


A) When you hold a Power On button, (Switch actually), in for a count of 10 seconds, it turns the computer off.

(There is a Power On switch, located behind the plastic Power On button. Usually, the Power On switch snaps into the housing of the plastic Power On button.

Example of a typical ATX Power On switch,

http://www.directron.com/atxswitch.html

The Power On switch turns the Power Supply on.

Old computers had a metal rod, that when the Power On button was depressed, the button pushed against the metal rod, which in turn pressed against a power switch located inside the Power Supply.

The design after that, was a power switch located in the Front Panel. (Plastic front of the computer) A large cable, (Wire) ran from the switch to the Power Supply.

Now there is the Soft Power On feature. (PS_ON)

The Power On switch is a small Momentary Contact Switch. Pressing it closes a circuit. The Soft Power On circuit.

When a power supply is plugged into power, there is a constant 5 Volts (DC) present.
This is the 5 Volt Standby.

Closing the Soft Power On circuit, redirects the 5 Volt Standby power to a circuit within the Power Supply.
This in turn 'excites' the Power Supply, and turns the Power Supply on.

Sorry to be windy, but I wanted you to know how the Soft Power On feature works )

eMachines are a budget computer. As such they save the consumer money.
However in order to do this, the manufacturer will install low quality parts, in some areas of the computer.

One such part is the Power Supply.

1) ALL the LED lights combined use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts

3) A typical Processor can use 51 to 125 Watts.
Depends on what Processor it is.
(Had you stated the Model Number I could have told you)

Enough power to spin fans, but not enough to spin fans, AND turn the Processor on.

Do you have access to another computer that is unused, but has a Known to be good, Compatible power supply?
It could be used for a test unit.

Tell me the Series, and Model Number of your eMachines, and I'll tell you what Wattage it should have, and what power cables, for the Power Supply.

(Some examples of Series, and Model Numbers, T1090, E4264, W2925, and so on. The T, E, and W are a few examples of the Series letter.
The numbers following the Series letter, is the Model Number)

If you wish I can direct you in removing the Power Supply, and installing the test unit. (And/Or a new Power Supply)

Sep 12, 2010 | E-Machines eMachines Desktop PC

2 Answers

Emachine T2742 wouldnt start, new powersuplly installed green board light on but still no response. switched out ramstick,stiil nothing. switched out main processer still no.hard drive OEM is ok what...


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.

Sep 14, 2009 | E-Machines eMachines Desktop PC

2 Answers

Can u possibly tell me where i might be able to download a schematic for an EMachine desktop computer model #T2742? It is out of warranty and was donated to our church and we need to know where to...


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

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Hope this helps!

Mark

Jan 04, 2009 | Computers & Internet

1 Answer

Installing new powersupply


what is your problem? the wires go up and go on 2 wires sticking up they should have something below them that match, you may not need all of them hooked up. the power you need, tri hooking them up and turn the computer off and on each time till you find out where the go.

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Emachine T2742 MB D845EPI/D845GVSR


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

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