Computer wouldn’t come on and was making one long beep followed by two short beeps. What’s wrong?

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My computer is working fine now. I had it plugged into the top plug on the wall outlet and it sounded one long beep and two short beeps. I unplugged it and plugged it into the bottom plug and my computer came on fine. What was the problem?

✅ Answers

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  • Depending on your motherboard. Usually a long beep has something to do with your memory

  • What’s your computer model? Different manufacturers have different beep codes indicating various faults during the power on self test. Beeps can indicate anything from a memory problem to a video failure or an issue with the power supply (the most likely problem since switching outlets seems to have fixed it)

  • This could be a Award bios or IBM Bios and both indicate a Video/monitor problem

  • from previous experience on my PC that’s a video card failure, but obviously it wasn’t a complete failure like the one i experienced.

    the cable connecting it to the monitor probably came loose and shorted it out the cable you replaced was probably the VGA/DVI/HDMI cable

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  • Depends on the make of your BIOS.

    http://www.computerhope.com/beep.htm

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