Question about Dell Dimension C521 PC Desktop

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How to reset cmos in c521 dell - Dell Dimension C521 PC Desktop

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Hello Friend, Follow the procedures in Before You Begin[Click here].

  • Reset the current CMOS settings:
  • Locate the 2-pin CMOS jumper (RTCRST) on the system board. See Jumper Locations [Click here]
  • Remove the jumper plug from pin 1.
  • Place the jumper plug on pins 1 and 2 and wait approximately five seconds.
  • Replace the jumper plug on pin 1.
  • Replace the computer cover.[Click here]
Hope this HELPED you...Thanks for Contacting FixYa...

Posted on May 31, 2010

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Go into the Dell BIOS, in one of the BIOS page there may be a option to select LOAD DEFAULT SETTINGS, if so select this and exit and save the settings.
If not, then remove the BIOS battery wait for approx 15mins for the BIOS to discharge its charge then insert the BIOS battery and configure the BIOS date and time settings etc.
If you do not want to wait for approx. 15mins then short out the battery contacts with a paper clip to discharge the BIOS charge.

Posted on May 31, 2010


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After clicking f2 and entering setup, what is the process of disabling the CMOS. After doing that, how do you save and exit and return to the operating system?

Were you locked out of windows? Clearing the CMOS will not fix that, it will only set your motherboard to standard factory settings. It is possible that in clearing the CMOS you have lost settings that are required to have the system start and until you reset those you may not be able to exit the bios.

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Hello, Open the case of the computer and look for the battery on the motherboard, slide the battery out and put a new one in it. You will have to reset the bios and the date and time.

Jun 30, 2012 | Dell Dimension C521 PC Desktop

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You might want to try a Microsoft common keyboard that hooks to the USB on your Computer same with the Mouse

Jun 01, 2012 | Dell Dimension C521 PC Desktop

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I want to disable a password that I put in error

Sorry there is no way to removed that password, you can try to erase CMOS memory setting the memory Jumper that is next to the motherboard battery. if not or if you remember the password then just try to input spaces on the password reset.

Jan 11, 2012 | Dell Dimension C521 PC Desktop

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I have to change the CMOS battery for my computer Dell dimension c 521, where can I get one near como

The CMOS battery on most computers is a typical watch battery. Most likely a 2032 or a 2025. Open your PC case with the power turned off. You should see a round battery on the motherboard. Take it out and bring it to a watch / electronic store. They will have a battery for you.

Aug 10, 2011 | Dell Dimension C521 PC Desktop

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How do you reset a forgotten password for dell dimension c521

I think it's F12 or F10 on boot up will restore it to factory, beware it does put all setting and folders back to factory settings to, so any data will be lost, it will be just as it came out of the box.

Hope this helps

Feb 13, 2010 | Dell Dimension C521 PC Desktop

1 Answer

I have a dell C521 tower,switch it on but light stays on orange,fans work but it wont switch

if the light remains Orange, Possible In Standby/Sleep/Hibernate Mode.
Try pressing And Holding The power Button For 4-5 seconds Or more.
If this Fails, remove the power Cable, remove side-panel ( Unless Warranted ) locate the silver cmos battery, on the motherboard. remove the battery for 10 seconds, replace and repower and startup. failing this i,d suspect the ram/memory or cpu.

Mike @ Compurepair.

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1 Answer

After post screen system ask to press f1 or f2

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Does it happen to mention CMOS settings at all? Usually this will happen if your CMOS battery has died, and will be fixed upon replacement. It is normally a CR2032 lithium battery, easily obtained at radio shack, walmart, etc. and super easy to replace.

Jun 22, 2009 | Dell Dimension C521 PC Desktop

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