On Tue, 27 Jun 2006, Harondel J. Sibble wrote:

Not so, most psu testers will supply a standardized load, the actual loads seems to depend on the tester.

True. Switching power supplies **must** have a load on them to fire up. A psu tester needs to have a "load" in order to test a psu, unless the tester uses the mb for the load.

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<http://www.fonerbooks.com/power.htm>

Flowchart for ATX Power Supply Repair

"This is necessary because switching power supplies won't operate properly without a load, either failing to come on or even self-destructing (in extreme, low quality, instances)."
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This Antec psu tester uses a 25W load.

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<http://www.antec.com/us/productDetails.php?ProdID=77003>

ATX Power Supply Tester

Features:

 * Allows quick and easy testing
 * Built-in 25W 5.4 ohm load to generate steady outputs
 * POWER_OK green LED indicates power supply is working
* +5V, +3.3V & 12V leads for volt metering to check output voltages
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