Home > Power Supply > Computer Power Supply Repair Manual

Computer Power Supply Repair Manual


Normally, a short circuit will result in a burnt smell and a ruined motherboard, sometimes damaging any of the attached components (memory, CPU, adapters) as well. This may be shipped with the 4 pin clip attached and the clip may not fit well on a 20 pin connector which could result in startup failures. But seeing a dead equipment that can be brought back to life is a joy and is one of the whole purposes being an electronic repairer. "Once in a while we Take the side off the PC case and make sure there are no signs of life, that none of fans in the case are spinning, including the CPU fan, the video weblink

Unfortunately, a simple DVM won't show you whether there is AC ripple on the DC voltages, which can cause all sorts of problems if it's bad enough. Transcript The interactive transcript could not be loaded. If Windows fails to turn off the power when you select "shut down," it's usually due to a corrupted file or bad setting in the operating system. It will be connected to almost every component inside the computer case and will look something like this: 4 Remove the case cover.

Computer Power Supply Repair Manual

That Molex cable provides the extra +5V and +12V (although not +3.3V) needed by the motherboard to operate. (Most motherboards do not have +3.3V requirements higher than the 20-wire cable can If the fan in your computer is failing to spin, it could lead to overheating and smoke in the system, all of which can cause a failed power supply. Since power FET already shorted, one must always check on all the components in the primary side. All aspects of the various form factors including physical dimensions, mounting hole locations, and cable connectors are rigidly standardized, which means you can choose among numerous industry-standard power supplies to repair

The replacement process requires you to remove the circuit board from the housing, unsolder the blown fuse from the circuit board, and then solder the new fuse back in place.Figure BWorking When your stuff breaks, they want to be the only people allowed to fix it. RodneyDickson 1,784,751 views 22:19 How To Convert A Computer Power Supply Into A DC Power Supply - Duration: 9:00. Power Supply Repair Guide Pdf So you can fix the stuff you own quickly—and get on with your life.

knurlgnar24 22,814 views 8:52 How to Easily Test a Computers Power Supply with Simple Tools - Duration: 15:53. Power Supply Troubleshooting & Repair Some high-current AGP video cards addressed this problem by including a Molex hard drive connector, to which you could attach a standard peripheral power cable. Co-authors: 36 Updated: Views:764,044 Quick Tips Related ArticlesHow to Buy a Power SupplyHow to Install a Power SupplyHow to Convert a Computer ATX Power Supply to a Lab Power SupplyHow to http://www.tomshardware.com/reviews/psu-repair,4147.html More wattage on the package doesn't mean better.

Start by removing the power and data cables from the DVD drive, you can do this with the power supply plugged in. Power Supply Repair Service Working on a power supply should not be taken lightly or attempted by someone with little electrical experience. Bob. Combining power factor with efficiency yields some interesting numbers.

Power Supply Troubleshooting & Repair

Don't skimp on the power supply, as you may regret it later. However, brand name manufacturers, especially older Dells, often used proprietary power supplies and made up their own color coding, so I wouldn't throw out a power supply that supplies 5V where Computer Power Supply Repair Manual For their mass-market, consumer-grade lines, even name-brand manufacturers may compromise on the power supply to meet a price point, using what we consider marginal power supplies both in terms of output Computer Power Supply Repair Pdf If a new component prevents the power supply from attaining stability due to excessive current draw, it should cause the power supply to withhold the power_good signal, preventing the motherboard from

If you believe the motherboard was badly damaged by a power surge or a short, it's possible the switch circuit has failed or that the power supply is immediately shutting off have a peek at these guys This signal allows the CPU to shut itself down if power becomes unstable during regular operation. In fact, the main power connector socket on all 24-pin motherboards we have seen is designed specifically to accept a 20-pin cable. If your goal is to reduce the noise level of your system, it's important to choose an appropriate power supply. Repair Laptop Power Supply

To do this, buff each end of the new fuse with emery paper to dull the chrome plating. I tend to leave these things alone on older PCs if they aren't bothering anybody. The Digital Right to Repair Act requires manufacturers to provide owners and independent repair information businesses with fair access to service information, security updates, and replacement parts. check over here I’ve also checked on the secondary Dual Schottky diodes and both were tested good.

Find out who represents you in the Illinois General Assembly. Computer Power Supply Repair Service HB 199, or the Fair Repair Act, guarantees our right to repair digital equipment like computers, refrigerators, cell phones and tractors. ALL THE JUICE THAT FITS When you replace your power supply, it's important to get a replacement unit that fits your case.


The percentage of the time it draws current is called the power factor, which is typically 70% for a standard PC power supply. Loading... It requires manufacturers to provide owners and independent repair shops with access to repair information and replacement parts—so you have the resources you need to fix things quickly and affordably. Computer Power Supply Problems And Solutions Pdf In this case, the high number of voltage-carrying pins is not intended to support higher current an SATA hard drive draws little current, and each drive has its own power connector

If you are getting beeps with a live screen, the problem is unlikely to be power supply related. Many high-quality power supplies include such an adapter in the box. 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 this content Yes No Cookies make wikiHow better.

For example, we have an NVIDIA 6800 Ultra video adapter that has a peak +12V draw of 110W. Flying Off the Rails Load regulation on the +12V rail became much more important when Intel shipped the Pentium 4. Some replacement power supplies have what is called a 20+4 motherboard connector. Line regulation is expressed in the same way as load regulation, and the acceptable percentages are the same.

Excellent thank you ;) Bruce M Hall - 03/05/2016 Reply Add Comment 1024 View Statistics: Past 24 Hours: 8 Past 7 Days: 30 Past 30 Days: 292 All Time: 18,554 25,399 However, if you feel that you are competent to do the replacement, here’s how.Remove and open the supplyTo begin, unplug the line-voltage power cord, open the computer’s case, and unplug all A fast PCI Express video card can easily draw more than 72W of +12V current, so something needed to be done. Tell them that you believe repair should be fair, affordable, and accessible.

Tell them you support the Digital Fair Repair Act, HB3030. Computer makers count pennies, literally. Privacy Policy | Cookies | Ad Choice | Terms of Use | Mobile User Agreement A ZDNet site | Visit other CBS Interactive sites: Select SiteCBS CaresCBS FilmsCBS RadioCBS.comCBS InteractiveCBSNews.comCBSSports.comChowhoundClickerCNETCollege NetworkGameSpotLast.fmMaxPrepsMetacritic.comMoneywatchmySimonRadio.comSearch.comShopper.comShowtimeTech That variance has planning implications, both for electrical circuits and for UPSs, which must be sized to accommodate the actual amperage draw rather than the rated output wattage.

That means, with very few exceptions, you can connect a new power supply to an old motherboard, or vice versa. Close Yeah, keep it Undo Close This video is unavailable. Do not do this on Dell Computers! Handle the power supply’s circuit board by its edges and DO NOT touch any of the soldered pins on the bottom of the board.

An expensive multimeter with sample-and-hold capability and a sampling rate of a few milliseconds can capture the min/max of the DC voltage, showing the presence of ripple without your seeing it The connections should be the same as they were before. Some motherboards put capacitors, connectors, or other components so close to the ATX main power connector socket that there's insufficient clearance for the extra four pins of the 24-pin power cable. Line regulation is measured by holding all other variables constant and measuring the DC output voltages as the AC input voltage is varied across the input range.