nissimezra
1 Copper

No restart, optiplex 755 Small Form Factor Computer

Hi everyone
I'm new here and thats my first thread

I would like to ask if someone came across this problem, I have dell optiplex 755 which does not understand the command restart, which means when you tell it to restart it will be froze and it will stay like that for ever, but if you give it a shutdown command it will shutdown correctly.

I've already tried windows xp vista windows seven and even a bootable cd like hbcd but the computer won't restart not even during the installation.
I've tried to replace hard drive power supply.
I've tried to hard reset it by removing the battery I even waited a day or tow but no luck

updating the bios from the os is not an option since there is no restart and by shutting it down it losses it from the memory cards and won't update.

any help will be grateful, maybe someone knows any other way to hard reset it, or any other way to flash the bios not from the os

I'll just want to say that the pc is working fine only with windows 7 64 bite other os can't be install or can be install but since there is no restart only manually shutdown after installing the os it will not recognize the computer hardware but 7 64 does

thanks

Nissim

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9 Replies
nissimezra
1 Copper

RE: No restart, optiplex 755 Small Form Factor Computer

anyone?

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nissimezra
1 Copper

RE: No restart, optiplex 755 Small Form Factor Computer

any ideas?

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RE: No restart, optiplex 755 Small Form Factor Computer

Hi Nissim,

I would suggest you to restore BIOS to defaults. You may follow the steps below:

  • Power on and tap <F2> 3-4 times at Dell logo to access system setup
  • Go to ‘Load Defaults’ listed under ‘Maintenance on left side and press <Enter>
  • Press <Esc> to ‘Save and Exit’ from BIOS.

You may run the hardware diagnostics on the system to check for the hardware functionality. You may follow the steps below:

  • Reboot and press F12 to enter the Boot Menu
  • When the boot device list appears, highlight Diagnostics and press Enter
  • The computer begins to run the Pre-boot System Assessment, a series of embedded diagnostics that perform initial testing on your system board, keyboard, hard drive, and display
  • In case any hardware component is bad, you will get a corresponding error

Please refer to the link: http://dell.to/1bal3Uh.

Keep me posted with the results. I will be glad to assist further.

Thanks & Regards
Amogh G
#iworkfordell
To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region USAIndia. For helpful Dell Support Videos, you may click Here

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nissimezra
1 Copper

RE: No restart, optiplex 755 Small Form Factor Computer

Thank you very much for your answer.

I already did all that, restore BIOS to defaults was the first thing, the second thing is to rest the bios by removing the battery, I run the hardware diagnostics and it pass everything. as I mention the computer is working fine with windows 7 64 the only problem is it won't restart but shut down no problem.

I'm electronic technician I thought someone came across this problem and can lead to the part that causing the problem, probably a short or disconnected transistor in the motherboard.

Many thanks for the answer.

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RE: No restart, optiplex 755 Small Form Factor Computer

Hi Nissim,

I would suggest you to do a clean boot using ‘msconfig’. You may follow the steps below:

  • Press ‘Windows’ key + R on ‘Desktop’ screen.
  • Type ‘msconfig’ in run box and press <Enter>.
  • Click ‘General’ and then check ‘Selective Startup’.
  • Now check if the system is getting the restart option.

You may try to boot in ‘Safe Mode. Please refer to the link: http://dell.to/1cdf2vi.

Hope this helps. Feel free to reply for any further questions.

Thanks & Regards
Amogh G
#iworkfordell
To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region USAIndia. For helpful Dell Support Videos, you may click Here

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nissimezra
1 Copper

RE: No restart, optiplex 755 Small Form Factor Computer

thanks for the answer

its new installation and yes i did a clean boot

as I said before there is no point to look at the operating system the problem is on the computer hardware it can't even restart during the installation every time that the operating sys try to restart during the installation i need to restart it from the main power bottoom.

if someone knows which part or which transistor responsible for restarting in the motherbord or if someone can tell me where to find schematic diagram of this computer it will help

again thanks for trying to help 

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RE: No restart, optiplex 755 Small Form Factor Computer

Hi Nissim,

I would suggest you to try and reseat the CMOS battery of the system.

For owner’s manual, you may refer to the link: http://bit.ly/ZXm4Kg.

Hope this helps. Please feel free to reply for any further questions.

Thanks & Regards
Amogh G
#iworkfordell
To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region USAIndia. For helpful Dell Support Videos, you may click Here

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nissimezra
1 Copper

RE: No restart, optiplex 755 Small Form Factor Computer

thanks for the answer

The first thing I did is to reset the CMOS battery of the system.

thx

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RE: No restart, optiplex 755 Small Form Factor Computer

Hi Nissim,

It seems the issue is with the system BIOS and it is not able to interact properly with the hardware maybe due to any external peripheral. I would suggest you to remove all the external components connected with the system and check if the issue still persists.

If it persists, then the issue is with the motherboard and it is needed to be replaced.

Keep me posted with the results. I will be glad to assist you.

Thanks & Regards
Amogh G
#iworkfordell
To know more about Dell Product Support, Drivers & Downloads, Order & Dispatch status -> choose your region USAIndia. For helpful Dell Support Videos, you may click Here

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