My PC shows up an OC fail error everytime I start it up and i used to continue to Windows without actually looking for the error. Today, it has stopped working, it boots up and then on a blank screen stops and starts beeping with 5 sets of sounds. What is the problem with it?

HP Compaq dx2280 MT, Award Modular BIOS v6.00PG, Intel 945 AGPSet BIOS for 8I945GM-RH-HP V1.07

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2 Answers

Per the service manual 5 beeps indicates a memory issue.

They describe two very similar failure scenarios, with some basic troubleshooting tips:

Blank screen and the power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Pre-video memory error.
1. Reseat DIMMs. Power on the system.
2. Replace DIMMs one at a time to isolate the faulty module.
3. Replace third-party memory with HP memory.
4. Replace the system board.

Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Memory is installed incorrectly or is bad. CAUTION: To avoid damage to the DIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a DIMM module.
1. Reseat DIMMs. Power on the system.
2. Replace DIMMs one at a time to isolate the faulty module.
3. Replace third-party memory with HP memory.
4. Replace the system board.

As per this manual 5 short beeps - BIOS recovery successful. You should reset BIOS using jumpuper or pull off the 3V battery for a minute.

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