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kr236rk
3 Silver

Optiplex 760 [small form] loud continuous bleep?

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Hi,

Have a 760 which has stopped booting. Instead it emits a loud continuous bleep at start-up. The message on a fairly blank Dell screen says "Attempting Network Boot" and that's about it.

Any clues please? Yesterday the pc was running 100% perfectly.

Thanks,

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speedstep
6 Thallium

Re: Optiplex 760 [small form] loud continuous bleep?

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This error is damaged Keyboard.  Remove mouse and keyboard.

  • Ensure that the cable is not damaged or frayed and check cable connectors for bent or broken pins.
  • Remove any keyboard extension cables and connect the keyboard directly to the computer.

Test the keyboard port.

Connect a properly working keyboard to the computer, then try using the bleeping keyboard.:emotion-3:

 Turn on with no cables except power cord. Then what happens?


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9 Replies
kr236rk
3 Silver

Re: Optiplex 760 [small form] loud continuous bleep?

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There seem to be 5? green led lights at the bottom of the tower. At the moment they show xGGxx

Earlier I had xxGGG. So nigh impossible to work anything out from them!

Very confusing. Continuous bleep or series of rapid bleeps merging into continuous tone - quite loud.

Can hear the fan ok at start-up.

That's all I can work out so far. I'm pretty sure this pc was upgraded from 32 to 64 bit just before I took delivery: it is a refurbished Dell.

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speedstep
6 Thallium

Re: Optiplex 760 [small form] loud continuous bleep?

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5 Beeps is Bad RTC Battery.

http://support.dell.com/support/edocs/systems/op760/en/sm/trouble.htm

Diagnostic Lights

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

To help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the front panel.

NOTE: If you are using an ultra form factor computer, the diagnostic lights are present on the back panel. See the Setup and Quick Reference Guide that ships with your computer for more information.

When the computer starts normally, the lights flash, and then turn off. If the computer malfunctions, use the sequence of the lights to help identify the problem.

NOTE: After the computer completes POST, all four lights turn off before booting to the operating system.

Diagnostic Light Codes During POST

Light Pattern

Problem Description

Suggested Resolution

Off

The computer is either turned off or not receiving power.

  • Reseat the power cable in the power connector on the back of the computer and the electrical outlet.
  • Bypass power strips, power extension cables, and other power protection devices to verify that the computer turns on properly.
  • Ensure that any power strips being used are plugged into an electrical outlet and are turned on.
  • Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
  • Ensure that the main power cable and front panel cable are securely connected to the system board.

Off

A possible motherboard failure has occurred.

  • Unplug the computer. Allow a minute for the power to drain. Plug the computer into a working electrical outlet and press the power button.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Blinking Amber

A possible motherboard, power supply, or peripheral failure has occurred.

  • Power off computer, leaving the computer plugged in. Press and hold the power supply test button on the back of the power supply unit.

If the power supply diagnostic light next to the switch illuminates, the problem may be with your system board. Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

If the power supply diagnostic light next to the switch does not illuminate, disconnect all internal and external peripherals, and press and hold the power supply test button.If it illuminates, there could be a problem with a peripheral. Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

  • If the power supply diagnostic light still does not illuminate, disconnect the power supply from the system board, then press and hold the power supply button.

If the light illuminates, there could be a problem with the system board.

If the power supply diagnostic light still does not illuminate, the problem is probably with the power supply.

Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

No CPU present.

  • Reinstall the processor and restart the system. If the computer still fails to boot, inspect the processor socket for damage.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

Memory modules are detected, but a memory power failure has occurred.

  • If two or more memory modules are installed, remove the modules, then reinstall one module and restart the computer.

If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error.

If only one memory module is installed, try moving it to a different DIMM connector and restart the computer.

  • If available, install verified working memory of the same type into your computer.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

A possible CPU or motherboard failure has occurred.

  • Replace the processor with a known good processor. If the computer still fails to boot, inspect the processor socket for damage.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

BIOS may be corrupt or missing.

  • The computer hardware is operating normally but the BIOS may be corrupt or missing. Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

A possible motherboard failure has occurred.

  • Remove all cards from the PCI and PCI-E slots and restart the computer. If the computer boots, add the cards back one by one until you find the bad one.
  • If the problem persists, the system board may be faulty. Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

Power connector not installed properly.

  • Reseat the 2x2 power connector from the power supply unit.
  • If the computer still fails to boot, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

Possible peripheral card or motherboard failure has occurred.

  • Remove all cards from the PCI and PCI-E slots and restart the computer. If the computer boots, add the cards back one by one until you find the faulty one.
  • If the problem persists, the system board is probably bad. Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

A possible motherboard failure has occurred.

  • Disconnect all internal and external peripherals, and restart the computer. If the computer boots, add the peripheral back one by one until you find the faulty one. Contacting Dell.<ADMIN NOTE: Broken link has been removed from this post by Dell>
  • If the problem persists, the system board is probably bad. Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady Amber

A possible coin cell battery failure has occurred.

  • Remove the coin cell battery for one minute, reinstall the battery, and restart.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady
Green

The computer is in a normal on condition.

The diagnostic lights are not lit after the computer successfully boots to the operating system.

  • Ensure that the display is connected and powered on.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady
Green

A possible processor failure has occurred.

  • Reseat the processor (see Processor information for your computer).
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady
Green

Memory modules are detected, but a memory failure has occurred.

  • If two or more memory modules are installed, remove the modules and then reinstall one module (see Memory).

Restart the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error.

  • If available, install working memory of the same type into your computer (see Memory).
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady
Green

A possible graphics card failure has occurred.

  • Reseat any installed graphics cards (see the "Cards" section for your computer).
  • If available, install a working graphics card into your computer.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady
Green

A possible floppy drive or hard drive failure has occurred.

Reseat all power and data cables.

Steady
Green

A possible USB failure has occurred.

Reinstall all USB devices and check all cable connections.

Steady
Green

No memory modules are detected.

If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error.

  • If available, install working memory of the same type into your computer (see Memory).
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady
Green

Memory modules are detected, but a memory configuration or compatibility error has occurred.

  • Ensure that no special requirements for memory module/connector placement exist.
  • Ensure that the memory you are using is supported by your computer (see the Setup and Quick Reference Guide that ships with your computer).
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady
Green

A possible expansion card failure has occurred.

  • Determine if a conflict exists by removing an expansion card (not a graphics card) and restarting the computer (see the "Cards" section for your computer).
  • If the problem persists, reinstall the card you removed, then remove a different card and restart the computer.
  • Repeat this process for each expansion card installed. If the computer starts normally, troubleshoot the last card removed from the computer for resource conflicts.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Steady
Green

Another failure has occurred.

  • Ensure that all hard drive and optical drive cables are properly connected to the system board (see the "System Board Components" section for your computer).
  • If there is an error message on the screen identifying a problem with a device (such as the floppy drive or hard drive), check the device to make sure it is functioning properly.
  • If the operating system is attempting to boot from a device (such as the floppy drive or optical drive), check system setup to ensure the boot sequence is correct for the devices installed on your computer.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

Blinking Green

The computer is in standby mode.

Press a key on the keyboard, move the mouse, or press the power button to resume normal operation.

Power Supply Diagnostic Light

The power supply diagnostic light located on the back of the computer, near the power connector. The light remains solid or off to indicate different states:

  • No light — Indicates no power available for the power supply or the power supply is not working.
  • Green light — Indicates power availability for the power supply.

Beep Codes

Your computer may emit a series of beeps during start-up if the monitor cannot display errors or problems. For example, one possible beep code may consist of three short, repeated beeps indicating that the computer has encountered a possible system board failure.

If your computer emits a series of beeps during start-up:

  1. Write down the beep code.
  1. Run the Dell Diagnostics to further identify the problem. (see Dell Diagnostics).

Code

Cause

2 short, 1 long

BIOS checksum error

1 long, 3 short, 2 short

Memory error

1 short

F12 key pressed

  1.  

Code (repetitive short beeps)

Description

Suggested Resolution

1

BIOS checksum failure. Possible system board failure.

Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

2

No memory modules are detected.

  • If two or more memory modules are installed, remove the modules, then reinstall one module and restart the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error. See Memory.
  • If available, install working memory of the same type into your computer. See Memory.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

3

Possible system board failure.

Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

4

RAM Read/Write failure.

  • Ensure that no special requirements for memory module/connector placement exist. See Memory.
  • Ensure that the memory you are using is supported by your computer. See Memory.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

5

Real time clock failure. Possible battery or system board failure.

  • Replace the battery. See Replacing the Battery.
  • If the problem persists, contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>

6

Video BIOS Test Failure.

Contact Dell (see Contacting Dell).<ADMIN NOTE: Broken link has been removed from this post by Dell>


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kr236rk
3 Silver

Re: Optiplex 760 [small form] loud continuous bleep?

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Thank you. Not five beeps please - 5 L.E.D. lights.

Beep is continuous, high pitched whine: no boot.

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kr236rk
3 Silver

Re: Optiplex 760 [small form] loud continuous bleep?

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What is the loud continuous bleep please - I cannot see it listed?

Many thanks.

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speedstep
6 Thallium

Re: Optiplex 760 [small form] loud continuous bleep?

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What color is the power button.

continuous sounds like bad power supply and or bad ram.

http://support.dell.com/support/edocs/systems/op760/en/sm/trouble.htm


Report Unresolved Customer Service Issues
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I do not work for Dell. I too am a user.

The forum is primarily user to user, with Dell employees moderating
Contact USA Technical Support






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kr236rk
3 Silver

Re: Optiplex 760 [small form] loud continuous bleep?

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The power button is black. Here is an action-replay of the fault:

s124.photobucket.com/.../r_i_c_2007

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speedstep
6 Thallium

Re: Optiplex 760 [small form] loud continuous bleep?

Jump to solution

This error is damaged Keyboard.  Remove mouse and keyboard.

  • Ensure that the cable is not damaged or frayed and check cable connectors for bent or broken pins.
  • Remove any keyboard extension cables and connect the keyboard directly to the computer.

Test the keyboard port.

Connect a properly working keyboard to the computer, then try using the bleeping keyboard.:emotion-3:

 Turn on with no cables except power cord. Then what happens?


Report Unresolved Customer Service Issues
here

I do not work for Dell. I too am a user.

The forum is primarily user to user, with Dell employees moderating
Contact USA Technical Support






Get Support on Twitter @DellCaresPro

kr236rk
3 Silver

Re: Optiplex 760 [small form] loud continuous bleep?

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Thanks SpeedStep, I swapped both mouse and keyboard. Before that I booted with nether & it started up ok. Any idea why the mouse or keyboard suddenly became troublesome please? The pc worked good as gold last night, I shut it down properly, then today I got all the flashing lights & bleeps.

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Moderator
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Re: Optiplex 760 [small form] loud continuous bleep?

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