Question about HP and Compaq Pavilion Replacement 200w Micro ATX PS3 Power Supply (PSHPPAVILION) Power Supply

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Pc no start.........

Hp pavilion windows 2000/me operating sys..... led on pwr sply comes on,,but when front panel sw goes out.......sys was wrk' 2000 screen came on,,,,,,,,rptd software problem,,,,wouldn't load...............then nothing ,on next attmpt to start......just led on pwr supply.....front panel led "flashed' when button pushed........unit is "2003" hp pavilion 7935

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Re: pc no start.........

You might have a bad power supply. If you have a voltmeter, check the voltage of the standby power supply. This voltage is present even if the system is off, plugged in. It powers a small portion of the logic circuit. It should measure within a couple of tenths of exactly +5 volts. If it is low, or high, this will prevent turn-on. The purple wire of the 24 pin connector is what carries this to the motherboard. The color coding layout is found at If by chance this voltage is OK, then check the full on voltages also. Repair of the defective supply is probably by replacement of one or more small electrolytic capacitors in the appropriate circuit, especially if you are technically savvy. Capacitors are available through several suppliers; Digi-Key supplyies Panasonic FC series which are suitable for switching power supplies. Or, you may just replace the whole unit.

Posted on Apr 25, 2007

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Check the line cord to see if it can carry power. Check the connection from the line cord to the power supply. It may be that the soldered connection is broken there and needs re-soldering. Check to see if it has any external or internal fuses that need replacing.

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I have the same problem with Demension 5150. Replacing the P/S didn't solved the problem. When I connected the P/S the motherboard green LED light lighted up, however, no matter how many times I pressed...

For non-BIOS issues:

If you did not try to update BIOS before the problem started then try these troubleshooting steps.

1. Full power down. Unplug the power cord from the Power supply. Then hold down the pc power button (this discharges any residual power in the capacitors).

2. Open the case and reseat the graphics card, hard drive, and RAM.

3. Take out one of the RAM sticks if there is 2 or more. Swap the RAM sticks in different RAM slots. Try one stick at a time to see if you can get the PC to boot. If this works, then the remaining ram sticks are damaged.

4. Set the Cmos jumper to clear. Power up the pc. Power down the PC. Set the Cmos jumper back to normal position, power up the PC.

5. Unplug and replug all the power supply cables.

6. Check the powersupply function. Either by a powersupply voltage checker (20-25 dollars at local PC shop), get the supply tested at a PC shop (usually a free service), put the powersupply in a different pc, or try a different powersupply in the problem computer.

If the Powersupply checks out ok, then you will have to do a process of elimination to find out what part or parts are the culprit of the No-Boot.

Start by pulling all the ram sticks if you have not already. This is the easiest components to check and usually a culprit.

Take out one of the RAM sticks if there is 2 or more. Swap the RAM sticks in different RAM slots. Try one stick at a time to see if you can get the PC to boot. If this works, then the remaining ram sticks are damaged.

If it is not the RAM, you have to continue removing items such as sound cards, un-plugging hard drives and optical drives, other PCI cards. Do this one at a time until you find the culprit. If a POST screen, meaning you can see Anything from the PC brand name to Motherboard brand name appearing on the screen. The PC may not boot to windows, but it Does post at this point, and with that the problem is resolved. If windows does not load, then you have a new problem. Best dealt with asking a new question.

Good luck!


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No power

An AT power supply must have current draw to turn on. Remove every component not needed for boot ( Floppy, Hard, CD DVD Fan. Leave on Motherboard and CPU and Fan. With header connections connected ( HDD led, PWR on, PWR Led and speaker ) push the on switch and make sure the back of supply doesn't have a switch. Does anything happen? Write me back if you want and we'll try to get some juice out of the supply.

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Most computer testing facilities will test your current power supply for free. A replacement is very inexpensive to replace. Bestbuy, MicroCenter, small computer shops and buy replacement from, Just make sure you have the correct information for your replacement. The model number on the power supply would be your best bet in most cases. Good luck and have a great day. I buy power supplies as low as $15 dollars Generic

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Mirus Desktop Computer

green-white for front panel Power indicator LED , Blue-white for RESET Switch , Orange-white for POWER BUTTON , Red-white for HDD LED . The berg pin header on the motherboard will have these legend printed just beside the connector or due to lack of space slightly away from it .

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yes PWR SPLY must be connected to MB and MB must be grounded when bench testing. thats the quickest easiest way to check..

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