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budthespud
Copper

Beep codes for optiplex 755 need help on identifying what is wrong.

Hi All,

 

I need to identify the part that is not working on the computer i have.

 

The led light in the front says 1 green solid no blinking.

 

and the beep codes are 1 beep pause 3 beeps pause 2 beeps.....

 

I have looked it up but i am not entirely sure of what is really wrong so i need some advice.

 

thanks

12 Replies
Davet50
Diamond

Re: Beep codes for optiplex 755 need help on identifying what is wrong.

The beep code of 1-3-2 is

 

1-3-1 through 2-4-4     Memory not being properly identified or used

 

I would suggest you remove all your memory sticks. Place one stick into Slot #1 on the motherboard and see if the system will boot. Try this with each stick individually

If it passes with all sticks try placeing them all back in and test again

 Home Built Sandy Bridge P8P67 i7 2600k @ 4.5 GHz 8gigs GSkill Ripjaws. Corsair 800D Case and AX1200 Ps X-Fi Titanium Fatal1ty pro PCIe Sound Card
Dell Studio XPS 1645  Window 10 Pro

Forum member since 2003

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budthespud
Copper

Re: Beep codes for optiplex 755 need help on identifying what is wrong.

My Buddy and I who are working on this tried what was in the post but we got the same results, i was wondering if am misunderstading the codes now...

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Davet50
Diamond

Re: Beep codes for optiplex 755 need help on identifying what is wrong.

Well it could be that the motherboard is bad in that case.

With no ram at all in the system it should give this beep code. If you tried all the sticks one at a time and still get the same error code it means either all the ram went or  the motherboard has an issue

 Home Built Sandy Bridge P8P67 i7 2600k @ 4.5 GHz 8gigs GSkill Ripjaws. Corsair 800D Case and AX1200 Ps X-Fi Titanium Fatal1ty pro PCIe Sound Card
Dell Studio XPS 1645  Window 10 Pro

Forum member since 2003

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Re: Beep codes for optiplex 755 need help on identifying what is wrong.

I recently had this problem and got the results above.  The owner of the computer had swapped out the correct memory chips and inserted chips that were not supported (they were PC-4200).   I checked Kingston's site, found the correct memory chips and got the machine working again.

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faby_12
Copper

Re: Beep codes for optiplex 755 need help on identifying what is wrong.

Hello, I wanna know where do you found all the optiplex 755 A11 bios beep codes,I was looking for it, but I never found them.

Can you tell me where,please?

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speedstep
Diamond

Re: Beep codes for optiplex 755 need help on identifying what is wrong.

Beep Codes

Your computer might emit a series of beeps during start-up if the monitor cannot display errors or problems. This series of beeps, called a beep code, identifies a problem. For example, beep code 1-3-1 (one possible beep code) consists of one beep, a burst of three beeps, and then one beep. This beep code tells you that the computer encountered a memory problem.

Reseating the memory modules may correct the following beep code errors. If the problem persists, contact Dell (see Contacting Dell) for instructions on obtaining technical assistance.


Code


Cause

1-3-1 through 2-4-4

Memory not being properly identified or used

4-3-1

Memory failure above address 0FFFFh

If you experience any of the following beep code errors, see Contacting Dell for instructions on obtaining technical assistance.


Code


Cause

1-1-2

Microprocessor register failure

1-1-3

NVRAM read/write failure

1-1-4

ROM BIOS checksum failure

1-2-1

Programmable interval timer failure

1-2-2

DMA initialization failure

1-2-3

DMA page register read/write failure

1-3

Video Memory Test failure

1-3-1 through 2-4-4

Memory not being properly identified or used

3-1-1

Slave DMA register failure

3-1-2

Master DMA register failure

3-1-3

Master interrupt mask register failure

3-1-4

Slave interrupt mask register failure

3-2-2

Interrupt vector loading failure

3-2-4

Keyboard Controller Test failure

3-3-1

NVRAM power loss

3-3-2

Invalid NVRAM configuration

3-3-4

Video Memory Test failure

3-4-1

Screen initialization failure

3-4-2

Screen retrace failure

3-4-3

Search for video ROM failure

4-2-1

No timer tick

4-2-2

Shutdown failure

4-2-3

Gate A20 failure

4-2-4

Unexpected interrupt in protected mode

4-3-1

Memory failure above address 0FFFFh

4-3-3

Timer-chip counter 2 failure

4-3-4

Time-of-day clock stopped

4-4-1

Serial or parallel port test failure

4-4-2

Failure to decompress code to shadowed memory

4-4-3

Math-coprocessor test failure

4-4-4

Cache test failure


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RoHe
Diamond

Re: Beep codes for optiplex 755 need help on identifying what is wrong.

Power off, unplug

Press/hold power button for ~15 sec

Reinstall all RAM modules

Remove motherboard battery and press/hold power button for ~30 sec

Reinstall the battery (right-side-up!) and see if it boots now

If it still won't boot, repeat what Dave suggested by testing each stick alone in slot 1, but this time do the "battery thing" after you remove and swap the modules into slot 1.  This will ensure that BIOS recognizes the hardware changes before it attempts to boot.

And if none of them work in slot 1, your motherboard probably failed...

Ron

Forum Member since 2004
I am not a Dell employee

faby_12
Copper

Re: Beep codes for optiplex 755 need help on identifying what is wrong.

Thank you 

I disassemble and reassemble all the pc's componets... and now it works. 

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RoHe
Diamond

Re: Beep codes for optiplex 755 need help on identifying what is wrong.

Ron

Forum Member since 2004
I am not a Dell employee

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