Solved

Asus Z87-Pro; new build, fails POST; Bios beeps and Boot Device LED got me down

Just put together a new desktop with all new components. Inside there's:
Asus Z87-Pro motherboard
Intel i-4770k processor; CoolerMax cpu cooler
Gigabyte Nvidea GTX 760x 4gb video card
Ballistix Sport 2x4gigs DDR3 Ram
Corsair 240gb SSD HD
WD 1TB SATA HD
LG DVD R/RW

With a VGA monitor and usb keyboard and mouse connected to the motherboard, the machine will power on. It beeps once, check the various components, and then beeps again (1 long, 4 short; the manual says this BIOS beep means "hardware component failure"). The Boot Device LED remains on, and the Q_Code screen shows "A2" for "IDE Detect." No signal is detected by the monitor. No other LED is lit.

After reading through the forums, I did not find anyone with this specific problem, and I tried the following, cumulatively:
1) disconnecting the optical drive
2) removing the videocard (which was in the recommended PCI slot)
3) re-seating the RAM (which was in the recommended A2/B2 configuration)
4) disconnecting, alternately, the WD and Corsair hard drives.

After each attempt, the result was unchanged (except for when I booted up without a keyboard/mouse plugged in - that gave me an 'input devices' Q_code). I am out of ideas and would really appreciate some help.
4 answers Last reply Best Answer
More about asus z87 pro build fails post bios beeps boot device led
  1. Best answer
    Well it's good to hear that your motherboard works.
    Make sure CPU 4/8 pins, ATX 24 pins, and CPU Cooler fan 4 pins are plugged in securely
    Boot the PC without anything other than CPU/MB/PSU connected, you should hear beeps.
    Boot the PC with the above and 1 stick of RAM along with video cable connected from rear panel of the motherboard (integrated graphics) to the monitor.

    See how it works.
  2. IDontUnderstand said:
    Well it's good to hear that your motherboard works.
    Make sure CPU 4/8 pins, ATX 24 pins, and CPU Cooler fan 4 pins are plugged in securely
    Boot the PC without anything other than CPU/MB/PSU connected, you should hear beeps.
    Boot the PC with the above and 1 stick of RAM along with video cable connected from rear panel of the motherboard (integrated graphics) to the monitor.


    Thanks for responding so quickly! I, too, am glad that the motherboard works, though I still need the rest of the team to get on board.

    After trying your prescription, the system powered on, but there was no beep at all. Instead, the DRAM LED and Q_code 26 lit up - this was true both times (the memory stick was in the recommended A2 slot).

    Also: the EATX, ATX, and CPU fans pins are all plugged in securely.

    [edit] Nevermind! I'm a dunce and didn't make sure the memory was seated properly. Once that was done, the computer booted, I heard a single beep, and Boot_Device LED and Q_code 99 (Super IO Initialization) lit up.
  3. On a Hail Mary, I reconnected everything, but plugged a DVI into the video card instead of into the motherboard. Bios loaded just fine, as I think it had been all along. The worrying 4 beeps turned out to be referencing a slow CPU fan. That needs to be fixed, but I'll ask that question in a new thread. Thanks for your help, IDontUnderstand.
  4. No problem, good luck with the rest.
Ask a new question

Read More

Asus Desktops New Build Motherboards