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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How do you jump start model dell ps-5201-1d i want to see if it works with out hook in up to the motherboard


use a multimeter or plug a fan into one of the molex connectors, flick the switch and some times the fans will twitch a little when the power supply itself is turned on.

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Intel D845EPI/D845GVSR


The battery is for CMOS, and only stores time and date, has nothing to do with checksum.

Sorry but you can't rig a cpu fan, you could just fry your cpu.

If the 20pin main power plug and you 12v atx power plug and plugged in correctly, and you cpu does not get hot within 30 seconds, you have probably fried it.

Sorry, but it sounds like there is nothing that can be done.


When ever you touch a motherboard, you are suppose to wear a anti-shock strap. You could wreck the board without one also.

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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.

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NEW BIOSTAR MOTHERBOARD DOES NOT BOOT


Good day sir, let try to test first the power supply, Unplug the power cord, remove the 20 pin (24 pin for the late model) molex power connector from the motherboard, plug in the power cord, get a 2 to 4 inch jumper wire, short the green wire with any of the red or black wire on the molex 20 pin power plug, the result maybe the following:
  1. you will see the power supply fan turn. you power supply is in good order. replug the power supply, and test again.
  2. you will see the fan turn for a few second then stops. you power supply is selective, and may require a different type of motherboard. Get a new one.
  3. you wont see the fan turn at all. get a new one.
If in case you are with #1. uinplug the power cord and remove all the expansion cards, data cables from the hard disk and cd drives. we are trying to isolate the problem. make sure that the only connected cables on the motherboard are as follows:
  1. 20 pin power cable.
  2. 4 pin 12 volt power cable (if applicable)
  3. speaker
  4. power switch
  5. power led
Test the pc once more. plug in the PC. If still the board wont power on. problem with your motherboard. Note:make sure your RAM is good. Hope this helps.

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dear,

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

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My computer just won't restart--I thought the switch had failed, so I just put the wires together for the momentary start button function, but no go. I can't think what else to check--I already put a new...


have you tried clearing the cmos memory? but put the jumper back to the correct position and the battery is not dead, then i would dissconnect everything so it would be left with psu plugged in to the m/board, cpu/fan,pwr switch nothing else except a speaker unless it has one built-in, you should hear some beeping from the speaker when you turn-on if not it`s dead R.I.P.

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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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I have a never used air conditioner, I put it in window plugged it in, when you hit reset button the green light power indicator comes on, when you hit test it shuts off, the power will not turn on at...


I'm assuming that you're hitting the buttons on the GFI outlet. The test will test the grounding of the outlet. The reset fixes it. These have nothing to do with the A/C. Hit reset and leave it alone.

There is a control panel with fan and temperature switches in the a/c unit somewhere. Turn on the fan/ a/c switch and set the fan on high. Move the temperature switch to mid-range. The noise on the unit should be a bit louder as the compressor kicks in to do the cooling.

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