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Pcs Connector
Why Does My P4 Connector Stop My Desktop From Running?
Question:
My PC suddenly stopped running; it wouldn't power up. I plugged in an old power supply and got it running, but the old supply was 100w less than the original and I couldn't run all my drives and cards. So I bought a new power supply with enough wattage. But if I plug in the 4-pin P4 connector, the PC still won't turn on. Unplug the P4 and everything receives power. Plug in the P4 and it won't start. Any idea why? Why would the P4 connection work with an old power supply and not the new power supply?
Additional Details
The main power cable plugged into the motherboard without any modifications. I used the yellow & black 4-pin ATX +12V, not anything else. However, the new power supply came with an 8-pin yellow & black plug that separated into two 4-pin plugs. I used one of these and left the other unplugged. The 8-pin yellow & black is an EPS connector that split in half. That's what I plugged into the +12V P4 connector.
Our Answer:
Hope this helps you to understand better & resolve your problem.
Many newer PSUs have a 24-pin main board power connector. If you are replacing the PSU on a system that uses a 20-pin motherboard connector, it can get a bit confusing at this point. Every quality PSU I have seen allows four of the pins on the 24-pin main power connector to be removed to be compatible with an older 20-pin motherboard. If your PSU does not have the ability to have four of the pins from the 24-pin main power connector removed, and your board requires 20-pin main power, you will either need to get a different PSU or a different motherboard to continue. Many newer PSUs also use an 8-pin power connector in addition to the 24-pin main power connector to supply the motherboard. Every PSU I have used offers an adapter to change the 8-pin main board power dongle to a 4-pin P4 power dongle. Be sure to use this if your board requires a 4-pin P4 connector and your PSU has the newer 8-pin connector built on. If you don't plug in the additional 8-pin or 4-pin power connectors, your system will likely not boot up.
About the Author
This Free Do-It-yourself tutorial is provided by www.computerspecialistonline.com

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