Question about Medion M3 Composer 5200 PC Desktop

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Power problems hit power switch and its like fan turns on for an instant then nothing. i ahve a molex plug that says p7 and is dissconnected, where should it be connected at?

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The P7 plug is likely a spare for additional drives. You are experiencing a no POST (Power on Self-Test) when just means the system fails to turn on. Since it is summer, it is lightning season, and a lot of systems experience failures due to lightning.

Things you can do.

1. If the system has a modem, and the phone line was connected to a telephone outlet, remove the modem card from the system, see if it will now turn on. If no different, disconnect all items plugging into the tower except power, try again, if it turns on, then power off, try attaching items one at a time till you ID the problem device.

2. If the system still turns off immediately, then the next suspect item is the power supply in the tower. Most towers now days use an ATX power supply that costs about $30 and can be bought either at a local computer shop or on-line at places like newegg.com

Posted on Jun 14, 2008

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1 Answer

Where does the p8 and p9 plugs go


They are just 2 of the 5 '4-pin' molex power connectors.

They are used to power the old PATA-style (and some SATA,) Hard drives and CD/DVD Optical Drives. Many additional Cooling Fans will also have 2 power connections, one for the 3-pin motherboard and one 4-pin Molex, either one may be used to power the fan.

If you have already connected your Hard drive and Optical drive and do not have any additional fans or Secondary Hard drives or Optical drives.....they should be 'tied-off' with a twisty and tucked away somewhere so as not to interfere with airflow throughout the case.

May 29, 2014 | Dell Dimension 2400 PC Desktop

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How to install Dynex ATX 520 watt power supply into HP Pavilion p7-1534 PC


is there a graphics card or are you using on-board graphics?
if graphics card, did you remove a plug from it when you removed the old p/s - if you did, you may need a molex to graphics card adapter.
The cpu shouldn't flash, if it does, it's probably shot along with the motherboard.

Apr 13, 2013 | HP Computers & Internet

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I have an eMachines T2200 The power supply started making noise and I shut the system off. The next time I tried to boot up nothing happens. I replaced the power suppy and when I turn it on the cd and dvd...


I would check to see if power is getting to your hard drive, Make sure the white molex's are plugged in.

E-Machines are, unfortunately the worst machines out there. They're up there with Compaq.
You're not going to like what I say but I'd urge you to buy a new one. Chances are it will take an arm and a
leg to fix what your using and for a little bit more money you can have a really nice one for 500 dollars
or less.

Dec 31, 2010 | E-Machines eMachines Desktop PC

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Presario 6000 desktop wont power up after transporting. Opened cover & I have loose wires that may be the problem. The loose wires are labeled p9 &p7.


Unfortunately, I do not know P9 and P7. Can you tell me if they are multiple colored wires going into a header/connector? If they are single wires or thin wires you may be able to look at your header of wires which connect the pwr button, rst switch, power led, speaker ( 4 pin thin connector ) if p9 and p7 came off here they could be your power switch.

Apr 11, 2010 | Compaq Presario 5000 PC Desktop

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I am looking for a wiring diagram for my emachine front power switch


Power Supply Types

There are two basic types of power supplies. There are AT power supplies, which are older and in older computers, and ATX power supplies, which you will find in virtually every new computer you can buy.

There are two fundamental differences between AT and ATX power supplies. First, the switch mechanism is different. AT power supplies use a normal on-off switch, which directly turns the power supply on or off.

ATX power supplies use a momentary switch which does not directly control the power. Instead, the switch signals the motherboard, which performs one of three actions:

  • If the computer is off, the power supply is turned on (which turns the computer on)
  • If the computer is on, the computer goes into power-saving mode (standby)
  • If the switch is held for more than 4 seconds, the power is cut and the computer turns off.
Because of this difference, ATX power supplies are better for projects that require the second power supply to turn on automatically when the computer is turned on.

The second difference is in the motherboard connector: AT power supplies provide two 6-pin connectors (figure 1), which are easy to insert backwards. The ATX connector is a single 20-pin connector that only plugs in one way (figure 2).
2psfig1small.jpg 2psfig2small.jpg
Figures 1 and 2: The difference between AT (left) and ATX (right) motherboard connectors.
Both power supplies provide two types connectors for plugging devices into. These connectors are called Molex connectors, and they come in two sizes (see figure 3 and 4). A power supply will generally have a few of each size.
2psfig3small.jpg 2psfig4small.jpg
Figures 3 and 4: Large (left) and small (right) Molex connectors.
There is no difference between the two sizes other than the size itself. Both sizes provide the same amount of power to whatever device is plugged into it (12V and 5V). The small Molex connectors are generally used only for floppy drives. Large Molex connectors power hard drives, CD/DVD drives, and many fans and lights as well.

Note: You can purchase large and small Y-adapters if you run out of Molex connectors. Be careful when using the Y-adapters however, because if your power supply does not have enough power for all the devices attached (especially true for older, lower-wattage supplies), you can damage it.

Dec 03, 2009 | E-Machines eMachines Desktop PC

2 Answers

No power when press the button, power plug is good?


Good day sir/ma'am, chances are that your power supply box is the faulty part. But to make sure let us test your power supply box. here are the steps:
  1. PC is off, open the side panels of the CPU, disconnect the 20(or 24) pin molex connector from the motherboard.
  2. Get a piece of jumper wire, about 4 inches and splice the ends.
  3. On the molex connector, locate the green wire, then using the jumper wire, short it with the black wire (there are lots of black wires there).
  4. look at the exhaust fan, at this point it should be spinning (good). if not here are the other possible outcome: (1) the fan did not spin. replace the power supply box with a new one. (2) the fan spins momentarily then stops, this condition only occur once. Its either your power supply has no load (intermittent symptoms), or the switching controller stage part is faulty. Better buy a new one than have a headache. (3) blows a fuse. replace the entire box.
If you have a good power supply, install it on your CPU and test.

Oct 28, 2009 | Acer Aspire L100 PC Desktop

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When I push button to turn on, the light flashes orange. Nothing happens, no fan, nothing. It worked fine yesterday.


This usually means a failed power supply and/or failed system board. No way to know further without swapping parts. Power supply is cheaper to replace .

Oct 05, 2009 | Dell Dimension E510 Dual Core 2.8 Ghz...

1 Answer

Can't find male side for P7 plug


dear,

maybe the fan is connected with pc source male jeck..check it by the way...

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Alarm


that does sound like a memory issue. remove the memory and reinstall it to make sure it is seated properly.

Robert

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