Please follow the troubleshooting steps listed below in order to solve your problem.
1 As the first troubleshooting step, we recommend you to clear the CMOS. To do this, please remove power to the motherboard, all cables and the RTC (Real Time Clock) battery for 45 minutes. After this period of time, insert the battery back in and turn the system back on.
2. The next step would be to test your system outside of the chassis. Place your motherboard on a table, on a non-conductive material, and try booting it with only basic hardware attached. This step is to ensure there are no grounding issues with the system case.
3. If this fails as well, please test all the components in a different system and make sure that every part is working fine. The most important parts to test are the processor, the motherboard and the system memory. (Please write down the model of the testing hardware).
On a non-booting system, the only way to determine the failing part (processor or motherboard) is by testing them both on separate systems.
4. Please refer to the following website for more information:
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Same thing. What's the delio?
Bad memory: I read this post and tried the first steps and that solved it. I have a Intel P55 MB with an i7, RAID card, simple graphics card and NIC, memory, 650W etc.
3 long beeps which according to the internets means keyboard/keyboard card error but it was the 3 short beep's error.
Oh, I had just bought an used the memory two months ago. What a gyp!