Question about Acer Aspire™ T180 PC Desktop

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PC won't 4power on.

Swapped out power supply with known good one and tested both with power supply tester. Both tested identically even 12v 4pin connector, drive power plugs and 3.5" power plug.  PC won't power on, no drive lights, not bios screen, nothing.  Green LED on mother board is lit.  

Had same problem with 4 year old eMachine and now this Dell 2400 which is a Celeron also.

Is there anything else besides taking out all peripherials and disconnecting all power connections to drives?  Is the only diagnosis that the mother board has failed?

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  • Steven Schultz Jan 03, 2009

    Thank you for the good advice.  I try those things.
    Thanks!

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Failures in the motherboard, memory, or any installed card could cause that symptom. All I can suggest based on the above information is remove memory one piece at a time and retest, remove/reseat video card if you have one, and attempt to reset the CMOS using the jumper on the board. You might also try removing the battery on the board and unplugging everything, then attempt to reboot.

Posted on Jan 03, 2009

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Do a visual inspection of the Electrolytic Capacitors on the motherboard first.

Then check the power supply with a power supply tester, (About $15), OR replace the power supply with a known, good one for a test.

Visual Signs of Capacitor Failure, http://www.capacitorlab.com/visible-failures/index.htm

Want to know more just state so in a Comment.

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Even though it's a new power supply, you can buy a dud sometimes.

Could be that there are Electrolytic Capacitors on the motherboard, that have dried up inside, and will show no obvious visual signs of failure.

Let's go back to basics, and get that power supply to fire up first.

1) Once, with no power cables of the power supply attached to anything.
2) Then after this test, power cables are attached to the motherboard, and all the other hardware components.

Will advise right now, that just because the power supply may come on, without the power cables attached, it does Not mean the power supply is good. The power supply may have one, or more weak voltage power rails.

No offense meant of any kind, but if it's a cheap power supply, the chances of it being a dud straight out of the box, are great.
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You may want to buy an economical power supply tester, ($12), to test the power supply, unless you have a multimeter available. I can walk you through testing with it.

This is an example. It is not an advertisement for said manufacturer, nor website,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1647108&CatId=1107

Basic information for the above power supply tester,

http://www.pcper.com/article.php?aid=246

To turn the power supply on without it being hooked up to the motherboard, you have to use a jumper wire to turn the Soft Power On.

I will detail this method out, after you have replied to the bottom of this solution's question.

We can do the two tests above without the power supply tester, or multimeter, But,

IF, the power supply fires up without having any power cables plugged in, we go to having the power cables plugged in, and using the jumper wire method.

IF, the computer does not start up with the power cables plugged in, and using the jumper wire method, we need the power supply tester, or a multimeter.

IF, the computer fires up with the power cables plugged in, and using the jumper wire, you need to replace the Power On switch.

Do you wish to proceed?

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