I have a PC DELL 755. When it reboot, it have a notice: " The system management hardware requires a reset.System setup configuration and the date/time require attention after the reset. Strike the F1 key to continue,F2 to run the setup utility Press F5 to run onboard diagnostics "
Posted by TAHIR... on
change the battery inside the computer on the motherboard then fix bios setting and them save and reboot should work fine then battery dead
Posted on Sep 10, 2013
how to reset my Dell OptiPlex GX520 PC Desktop Bios password
Posted by cave1969 on
if you can open the cabinet and there on the mother board you will find a CMOS battery (round one) take that battery and keep it out for around 3 mins and then put it back properly - start your computer - BIOS password will be reset .
Posted on Oct 04, 2010
My Dell optiplex gx520 is not booting up everytime i press power button. Tha CPU and Pow Supply fan is not working whenever i press power button. when i plug the power cord to the Power Supply there is an orange light indicator on the motherboard. What des this mean?
Posted by arumja on
its going to rather your power supply or your motherboard has died, id try a different power supply first
Posted on Aug 11, 2008
Dell Optiplex GX520 message:
"Alert! System battery voltage is low."
PC clock is 5 minutes behind.
Posted by Amelia... on
there is a 3 volt flat battery inside the computer, it in most cases clearly visible.
Replace it with the same type of battery, then adjust the clock in the system setup.
All done, all fine.
Let me know if you need anything else.
Posted on Feb 17, 2009
Bios password removel of Dell Optiplex GX280
Posted by sateesh... on
If you don't know the BIOS password, and need to access it - you'll have to
unplug the AC power then open the case and remove the lithium "coin" or "button" battery from the
motherboard. Wait 5 - 10 minutes (allows the capacitors to discharge) and replace the battery. This will RESET all BIOS values to default.
Restore AC power reboot. Enter the BIOS and change the values as desired. To access the BIOS, Press the F2 function key repeatedly during boot sequence. You may need to plug the USB keyboard into a different USB port if it doesn't let you in to the BIOS page.
I hope this helps & good luck! Please rate my reply - thank you.
Posted on Feb 22, 2011
What is the default password to get into the BIOS, to set up the boot sequence...on a Dell Optiplex GX520 Desktop
Posted by tenneseesw... on
The BIOS default password is just blank, and it is not asked.
When you set a bios password, you are asked to enter a value, therefore if bios is asking the password, the password had been changed.
To reset the bios password if you do not know the password you need to access to motherboard and temporarily remove battery for few seconds.
Removing battery will reset bios and delete the password.
Unplug power cord before accessing the motherboard, and try not touching the motherboard with your finger.
Put battery back in place before restarting computer.
See also the following websites:
Posted on Mar 04, 2009
Dell OptiPlex CPU FAN is runing at high speed
Posted by chajackson on
Change the setting in the BIOS menu. reboot your computer.. when you see the dell logo.. press F1 (or F2 if F1 doesn't work) button until you see the BIOS screen. Check for fan options and change it
Posted on Jun 20, 2009
Hey i bought an Optiplex 745 from E-bay and i am having troubles running it
Posted by nasdamill on
No boot device means that the computer cannot find a drive that has a operating system files and therefore cannot boot up.
This usually means that the hard drive in the computer is faulty.
You need to get a new hard drive and install Windows on the hard drive, together with the drivers for the computer's installed devices and programs to get a working computer.
Posted on Sep 07, 2009
Here at the Box Offices I have found 2 GX520's that will not boot and begin to buzz (3 times but not really) upon power-up to boot.
Posted by gmcnutt on
If your computer beeps during start-up:
Microprocessor register failure
NVRAM read/write failure
ROM BIOS checksum failure
Programmable interval timer failure
DMA initialization failure
DMA page register read/write failure
Video Memory test failure
1-3-1 through 2-4-4
Memory not being properly identified or used
Slave DMA register failure
Master DMA register failure
Master interrupt mask register failure
Slave interrupt mask register failure
Interrupt vector loading failure
Keyboard Controller test failure
NVRAM power loss
Invalid NVRAM configuration
Video Memory test failure
Screen initialization failure
Screen retrace failure
Search for video ROM failure
No timer tick
Gate A20 failure
Unexpected interrupt in protected mode
Memory failure above address 0FFFFh
Timer-chip counter 2 failure
Time-of-day clock stopped
Serial or parallel port test failure
Failure to decompress code to shadowed memory
Math-coprocessor test failure
Cache test failure
Posted on Apr 11, 2009
my dell OPTIPLEX GX520 is given a headache if i on it the green power light does not come on again but a orange light shows up.so there is no display or bootin from the hard drive.plz help me urgently.thank you
Posted by boaernybro... on
REMOVE board from cabinet then check you can easily track the problem
Posted on Feb 07, 2009
434 questions posted
Usually answered in minutes!