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Hardware - Power Supply Connector Issues

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What is important is to find out why this PSU On signal is not at the expected logic 1 state. If it is still incorrect (logic level 1) you either chose the wrong type of power on circuit (Normally open or closed) or the motherboard is bad. Even when unplugged, a supply should be considered dangerous. Unplug the PSU from the live outlet and then disconnect the 20 Pin connector from the motherboard. http://magicnewspaper.com/power-supply/graphic-card-power-to-power-supply-or-connector-on-motherboard.html

While it is logically correct, do not consider this preceding text an exact engineering reference document. This is a quite long and detailed troubleshooting procedure but my aim was also to explain why we perform certain tests and what conclusions we can then reach. On your meter make sure it is set to measure DC volts. Note that there is less than a 5% chance the PSU just can't handle the load of a hard drive.

Troubleshooting Power Supply Computer

Now connect your red lead of your meter to +5v Standby on pin 9 which has a purple wire on it. Is the cord from the adapter to the wall fully plugged in on both ends (try wiggling)? It supplys power to the input-side of the voltage regulators, just like the power from the AC adapter.

These include:A system that is completely dead (nothing happens when the system is turned on)SmokeCircuit breakers popping when the PC is turned onMeasure the output voltagesOne of the simplest tests you We have now either rectified any problems with or successfully tested the 5v Standby voltage, The +-12,+-5, and +3.3 voltages, The PSU On signal, and the circuitry that produces and responds Verify your power supply meets the requirements of your motherboard, processor, and video card. Power Supply Troubleshooting And Repair A malfunctioning power supply can not only cause other components in the system to malfunction, but it also can damage the other components in your computer by delivering an improper or

Text Quote Post |Replace Attachment Add link Text to display: Where should this link go? Power Supply Problems And Solutions Try the computer in a different outlet in order to eliminate the outlet as a possible source of the issue. An electrical short had developed somewhere inside the laptop. I take the whole laptop apart and add a little bit of solder to the connections it works properly again.

Because of its importance to proper and reliable system operation, you should understand both the function and limitations of a power supply, as well as its potential problems and their solutions. Computer Power Supply Problems And Solutions Pdf I know for a fact that the computer works itself. Liquid can cause the following types of damage: Short circuit due to wet liquid (problem goes away after liquid evaporates) Short circuit due to dried liquid residue Corrosion (especially bad with Incorrect power supply If you are building a computer, or it has never been turned on it may have a defective power supply that is not supplying enough power.

Power Supply Problems And Solutions

If you still can't get the system to come up, skip the following and go on to the next section. How exactly would it cause those problems? Troubleshooting Power Supply Computer More resources Tom's Hardware Around the World Tom's Hardware Around the World Denmark Norway Finland Russia France Turkey Germany UK Italy USA Subscribe to Tom's Hardware Search the site Ok About Power Supply Failure Symptoms To test the output voltage at the motherboard, place the black meter lead on a black pin and the red on the Power_Good pin (P8-1) of AT, Baby AT, and LPX

Search all support All Support Software, Drivers and Updates Troubleshooting How to Product Information User Guides Cancel Example: “Laserjet P1102w driver” or “HP Pavilion 17-f002na will not turn on” Loading Results http://magicnewspaper.com/power-supply/connecting-2x2-connector-from-power-supply-into-motherboard-shorts-everything-out.html When the PSU has completed enabling its primary converter and the +5 and +3.3 output voltages are deemed stable, it asserts the Power Good\OK signal (Active High). If you now have +5v and the PC tries to boot, you have a bad hard drive. If the system won't try to come up with this extra load you have a failing PSU. Signs Of Power Supply Failure

Use the right equipmentMost of the experienced technicians I know use good quality DMMs (digital multimeters, see Figure A). jtp542Sep 16, 2013, 1:01 AM RaDiKaL_ said: Some more info regarding your pc specs (all of them) would help us to pinpoint the problem (very unlikely your pc would turn on The tables below show the pin-outs for AT and ATX supplies (Figures C and D) and the Molex 4-pin drive connector (Figure E).Figure CFigure DFigure EAlways have a spareSome problems cannot If you have a desktop computer and plan on trying to repair the computer yourself open the computer and verify the power connections.

All Rights Reserved Tom's Hardware Guide ™ Ad choices Articles & News Forum Graphics & Displays CPU Components Motherboards Games Storage Overclocking Tutorials All categories Chart For IT Pros Get Power Supply Failure Causes See if you can locate where the PC's power on pushbutton is connected to the motherboard and disconnect it. ATX PSU power up sequence and cable connector pinouts Now with all the caveats and warnings out of the way lets get down into the good stuff.

If all conditions are proper for that step we will then move on to the next.

If you have the means, try swapping out the PSU or testing it in another system to be 100% sure it's not the cause. Can't find your answer ? This lint would likely stay clumped together and not leave the machine chassis.) (Click photo to enlarge) Removal of the lint did not remove the suspected electrical short. How To Check If A Power Supply Is Working If using a DMM use a range that allows 2 digits to the right of the decimal point.

It can be affected by the motherboard, Drives, and USB devices. Ask the community! The additional power needs can exceed what the power supply is rated for. http://magicnewspaper.com/power-supply/power-supply-connector-to-h-d-is-thin-5-wire.html This is why it is important to protect your PC with a surge protector or - better still - an Uninterruptable Power Supply.