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{SOLVED} ATX Power Supply Problems

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It should read between +3 to +6 volts DC. Unplug the power supply cord from the outlet and plug a working lamp into the very same socket to test it. Post a comment or write to us.   Comments Facebook Linkedin Twitter More Email Print Reddit Delicious Digg Pinterest Stumbleupon Google Plus Powered by Livefyre Add your Comment Editor's Picks 10 The boot failure may be unrelated to the new component, but you could have dislodged a connector, left a loose screw rolling around, or unseated an adapter while working in the http://magicnewspaper.com/power-supply/solved-power-supply-problems.html

Transcript The interactive transcript could not be loaded. If you've reached this point without ever getting the system to power up, you probably have a defective motherboard. Check the power lead to the CPU fan. (This is usually a small-gauge pair of wires that can break if you pull too hard.) On some PCs, you must also remove The system returned: (22) Invalid argument The remote host or network may be down.

Computer Power Supply Problems And Solutions Pdf

If you did not check on the primary winding first and you concentrate on checking other components, time will be wasted if at the end of the troubleshooting you found that I've only seen this problem with cheap or failing power supplies, though ironically, some of the cheapest power supplies fake the power_good signal by tying it to their 5V output. If power comes on, shut down again and reinstall the other components. This method eliminates any case mounting issues from the troubleshooting process, but it introduces all sorts of risks, not the least of which is absence of the case ground.

Because power isn't coming on at all with the motherboard attached, it's very unlikely that the problem is the power supply failing to produce all of the different voltages required by Return to Diagnostic Chart Since the PC powered up with nothing but the hard drive connected, the power supply is probably good and there is either an excessive current draw or A replacement supply should provide at least as many watts as the old one. Computer Power Supply Repair Pdf Use the right equipmentMost of the experienced technicians I know use good quality DMMs (digital multimeters, see Figure A).

You must unplug your ATX power supply from the wall before working inside the case. Computer Power Supply Repair Manual Even when unplugged, a supply should be considered dangerous. However, if you ever thought there was a burnt smell or sparks coming from the drive area in your PC or from the drive itself, don't test it in a good

I saw this on PC Advisor and thought you should see it too.

This had proven no more shorted components in the power supply and I can place back the main fuse and turn the power supply “On”. Power Supply Failure Symptoms If that screw lands in just the wrong place, like an open bus slot, it could create a short and damage the motherboard. You can usually hear the mechanical components in PCs that make rotational noise when they are powered up. ATX technology PCs don't switch the line voltage, as did the previous generation AT power supplies.

Computer Power Supply Repair Manual

Sign in Transcript Statistics Add translations 162,791 views 749 Like this video? try this TechRepublic Search GO Cloud CXO Software Startups Innovation More Data Centers Hardware Microsoft Google Apple All Topics Sections: Photos Videos All Writers Newsletters Forums Resource Library Tech Pro Free Trial Editions: Computer Power Supply Problems And Solutions Pdf Asus, for example, provides a tool that reports the voltages being supplied to the motherboard. Power Supply Troubleshooting Pdf For your information I did not directly turn “On” the power supply after the replacement of new components.

If there's more than one hard drive installed, you can leave those power leads connected as well. navigate to this website If you are unsure or uncomfortable with working around high voltage,don’t! After spending some times on this power supply I concluded that only the Fuse (2 Amp), 2X Diodes (2A05), Power FET (7N70P), Power IC (TL3845p) and current sense resistor(0.18 Ohm) have I have checked the resistors, capacitors, transistors and even the 3 Optoisolator ICs and all were tested good. Power Supply Troubleshooting And Repair

Sometimes they give the peak current requirement in Amps (A) at the supply voltage, usually 12V, so you multiply the two numbers for the power consumption in Watts. Your PC should also give a single beep if it passes its internal start-up diagnostic, and there are always status LED's to tell you the system is on, though some home If any of these values strays too far from its intended value, you probably have a PSU issue. More about the author I'm always coming across power strips with one or more bad outlets.

If your PC is not right, the PSU could be to blame By Paul Monckton | 28 Feb 13 Share Tweet Send  Hi. How To Check If A Power Supply Is Working LEARNINGCHORDS 28,545 views 11:40 Inside a Failed ATX Computer Power Supply - Duration: 8:52. Return to Diagnostic Chart If you've done any work in the case immediately before the boot failure, undo it, even if it means swapping the old component back in.

Conclusion- I knew that many of us no longer repair cheap and throw away electronic equipment.

If you're working on a server that uses SCSI drives, make sure the SCSI jumper to delay drive spin-up isn't set. The power switch is programmable and the action can often be defined in CMOS Setup or Windows. solved Display problems, I'm thinking power supply is the culprit, but I'm a newbie solved Having Problems with Power Supply solved power supply problems solved Hard Drive to Mother Board to Signs Of Power Supply Failure 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

Recommended CRT TV Repair ebook by Humphrey Kimathi Recommended Computer Repair Course Automobile Electronics Repair Basic LaserJet Printer Repair Remove the motherboard and check for a standoff or screw installed in the wrong place or rolling around loose. Otherwise you can turn off your power strip, if you're using one, or just pull the plug. click site Category People & Blogs License Standard YouTube License Show more Show less Loading...

Each component will, of course, have to be reconnected to the new PSU. Return to Diagnostic Chart A noisy power supply fan can usually be cleaned or replaced easily enough, though you have to watch out for the big capacitors in the power supply Experience can help a tech diagnose problems caused by a faulty power supply that would normally be overlooked by a novice. All the filter caps in primary and secondary side looked good except the main fuse.

Since it's a live power test, don't try it if you aren't comfortable working with live equipment and might jerk away in surprise when the power does come on. If you get into a flaky failure situation that you can't diagnose and you've already started swapping parts, you may as well try a new power supply as well. Visit Windows 7 Advisor and Windows 8 Advisor for more Windows advice. I normally look there first when the symptoms are a little weird.

Sign in to report inappropriate content. I've seen power supplies produce some really bizarre failures, like a PC that reboots when you set your coffee cup down too hard on the table. This lead is usually labeled PW-ON or PW and it reaches from the front the PC case to a small block of metallic pins for case connections to the motherboard. If you are running with dual PCI Express video cards, try running with just one and then just the other.

The power supply may instantly turn itself off again if there if there is a short circuit in the hard drive or if the load is insufficient. With the power supply unplugged, reconnect all of the power leads you removed in the previous step, then try powering up again just to make sure a bad connection wasn't your Even if you've built a number of PCs in your life, it's normal to get this connection wrong when you replace or install a new motherboard due to poor identification of Sign in 68 Loading...

All of the high end video cards require more power than can be supplied through the PCI Express slot on the motherboard, so they are fed directly from the power supply If the case is reasonably well-designed then you can simply take out the old PSU and slide in a new one, although it can be tricky if there isn't much room Any longer strings of beeps are usually due to a hardware failure (or something pressing down a key on the keyboard) and the beep codes depend on the manufacturer. Unstable voltages and AC ripple on the DC are real ghosts in the machine, and can mimic all sorts of other problems.