What is this messages mean ?

Hi mimoboy,

I understand you are getting this message once the system boots. This message comes when system tries to boot from the network. Please post a screenshot of your Boot Sequence in BIOS as if harddrive is set to boot first you should not be getting this message.

Also, let us know the complete error message that you receive on the system regarding the cover so we can check the same advise you further.

Keep us posted with the results so we can advise you further.

Hi Sandeep P

I understand you are getting this message once the system boots. This message comes when system tries to boot from the network. Please post a screenshot of your Boot Sequence in BIOS as if hard drive is set to boot first you should not be getting this message.

I am sure that my hard drive is set to boot first

(when i buy the PC the boot was from network and i change it to hard drive)

Also, let us know the complete error message that you receive on the system regarding the cover so we can check the same advise you further.

this is the message that i got :emotion-8:

and another message for the cover alert but i can't shot it (is so fast)

initializing Intel (R) Boot Agent GE V1.2.50
PXE 2.1 Build 000 (WFM 2.0)

Keep us posted with the results so we can advise you further.

Thanks Sandeep P for helping me :emotion-51:

this is my boot Sequence

_

Hi MIMOBOY,

Thanks for providing us this information.  Its quite strange to see that system is attempting to boot from the network even when harddrive is selected as first boot device. Please update the BIOS of the system from the link below:

BIOS

If you have recently added any hardware on the system then let us know. Keep us posted with the results so we can advise you further.

Hi Sandeep P,

First

I should thank DELL Team for make our life easier

To be honest I was afraid from Updating my BIOS :emotion-40:

This is easier BIOS update i have ever seen :emotion-51: :emotion-51: :emotion-51: :emotion-51: :emotion-51:

Second

The Problem is still (and the update didn't solve it)  :emotion-40: :emotion-9:

Information From my PC after Update

And video From my PC BIOS sys  

Tanks For Helping me again

Sandeep P :emotion-51:
 

Hi MIMOBOY,

I appreciate the time and effort that you took to troubleshoot the issue. I understand that even after updating the BIOS as well you are still getting the same message.

Please let me know if there is a network cable plugged into the system. Kindly disconnect the same and let us know if it helps. Also, if the similar issue persists then kindly disable the network/ethernet card in the BIOS and check again to boot the system.

You are most welcome and we appreciate your efforts in the same.

Keep us posted with the results so we can advise you further.

Hi Sandeep P,

The way that it get internet service is in that way

yes i have "network cable plugged into the system"

i Kindly disconnect the the network cable and still have the message

"but that is not solve it"

and i don't know if i disable the network/ethernet card in the BIOS

how i can get in to the internet ??

I just make like "natakuc4" said and the message didn't appear again 

Thanks a lot to

Sandeep P  & natakuc4

Still have the cover alert only now

(I don't know where i should plug in this cable ????!!!)

Looks like a spare power cable, its not an uncommon sight in Dell desktop computers.

You can use it if you get a second hard drive for instance.

hi natakuc4,

my friend this cable isn't spare power .

this cable(and the button) tell the BIOS System that the cover of the case is locked

(that is what i know)  :emotion-42:

but i got it not plugged in

So the question is

Where i should plug in this cable ????!!!

:emotion-9:

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I have several OptiPlex 755 DT systems in the lab which are the same as yours and the cable you are holding in the picture is a spare power cable.

The part that you have circled in red, I'm not sure what it is.

However I have powered up most the units without the computer cover on quite often and never got any warning in the BIOS.

I also see no mention of it in the manual.

Hi MIMOBOY,

Its great to hear that you are not getting the message now at the boot. However, let us know the exact message or a screenshot of the cover message you are getting on the system.

As natakuc4 is right in stating that you can switch on any system without the cover as well and it should be able to boot properly without any message. Keep us posted with the results so we can advise you further.

Thanks and Regards
Sandeep P
#iworkfordell

hi Sandeep P,

hi Natakuc4,

my friend "Natakuc4" i told you that is what i know (maybe i am wrong)

and i think i got the PC and the this cable without that jak :emotion-7:

i got the PC and this cable was just red cable and black one

and the seller put the small black piece in the end of the cable  (i call it jak)  :emotion-42:

maybe its not the one :emotion-8:

then i thought he make the right :emotion-9:

being this cable correct or not

i just want to disappear this annoying message  :emotion-6:

The part that you have circled in red, I'm not sure what it is.??

this part is the button of the cover i think (it is a button) :emotion-40:

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This is a screenshot form the BIOS

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This is a Video form the BIOS

And this is the Alert Message

Alert! Cover was previously removed.

Thanks a lot to you both

:emotion-51: :emotion-51: :emotion-51: :emotion-51:

I am so sorry for late replay :emotion-6:

the internet service was disabled :emotion-9:

Some help please for my last problem

:emotion-6:

Hi MIMOBOY , Apologies for the delayed reply. Please check this article which would be helpful in resolving this issue: http://dell.to/1aHPbtZ Keep us posted with the results so we can advise you further.

This message appears if the computer cover has been removed. This behavior is part of the intrusion detection feature of the OptiPlex computer. The intrusion detection feature is designed to enhance security.

when i say this Alert! is for the cover and this picture and the button is to tell the BIOS sys that the cover  has been removed .....etc

I was Right :emotion-1:

what i know about OptiPlex computer that Dell made it well
and this is a wonderful part in this computer in my opinion

i will try to follow this instructions

and tell you what i got

Note: this instructions not for my 755 but i think it will be helpful

I can't thank you enough for helping me

Really thanks :emotion-21:

:emotion-51: :emotion-51: :emotion-51: :emotion-51: