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Troubleshooting a computer that doesnt start

I have a desktop computer compaq 1.0ghz that started giving error messages at startup (cmos error, time date not correctly configred) I would configure this but it would return from time to time until today when it cannot bootup at all or even show power indicators. i opened the casing and there are led(green) still on when the power is plugged in. onether one comes on when the power button is pressed on but nothing happens not even the power supply fan rotates. Please assist Thanks jonnieke

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  • Anonymous Mar 19, 2014

    I want to replace my power supply as the fan creates grinding noises from time to time. What kind of unit should I order that will fit my case and work with what I have?

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andrew pester

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It's more than likely the CMOS battery a disk shaped 3V watch type battery found on the motherboard. Change this then reset time and other settings and your away.

Posted on Dec 26, 2006

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Unable to log in
Which operating system ?
The Compaq Presario CMOS password is an administrative security measure built into the firmware of a Compaq computer.

This password is stored in the motherboard's BIOS (Basic Input Output System) and provides for hardware-level security.

This password may be accidentally set or forgotten over time and must be reset in order to boot the computing system.

Disconnect the Compaq computer from any electrical sources and remove the side access panel from its case.

This may require the removal of one or more thumbscrews on the rear of the computer case.


WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules

Locate the CMOS battery.

This battery is a round button-type battery located in the bottom-right corner of the Compaq Presario motherboard.

Grip the battery by its edges and pull it straight away from the motherboard to remove it.


Press and hold the power button on the case for ten seconds to remove any remaining electrical current from the computer.

This removes the CMOS settings and returns it to the default state of having no password set.

Replace the CMOS battery.


Replace the computer's side access panel and re-establish any previously severed electrical connections.
http://www.youtube.com/watch?v=zjGHpJqVJkM
Replace a CMOS battery inside a desktop computer

http://www.dewassoc.com/support/bios/bios_password.htm

http://www.tips4pc.com/articles/Computer Troubleshooting/Remove the CMOS battery to reset the bios password.htm

Jan 14, 2014 | HP Compaq Presario SR5450F (KJ383AA) PC...

Tip

How to verify that the CMOS battery needs to replace
<p>The CMOS battery is named after the Complementary Metal Oxide Semiconductor power. The CMOS has the current date and time functions for desktop and laptop computers. It allows the computer to automatically adjust the time, even on computers that are disconnected for long time. When a computer no longer has the date and time and forget it on every boot, the CMOS battery probably needs replacing. Some computers have messages when the battery is weak, while others just lose the current date and time after each shutdown.<br /> <p>Time & Date Errors<span> </span><br /> <p><span> </span><br /> <p>1. Turn on the computer. Look in the task bar at the bottom right. Make sure the date and time is set correctly. Double-click the time and click the up or down arrow to switch to the correct time. Click on the arrow next to month to change the month. Click "OK" when finished.<br /> <p><br /> <p>2. Turn off the computer. Wait 3 to 5 minutes and start the machine.<br /> <p><br /> <p>3. Look on the taskbar to see if time was lost and said a strange date January 1, 2000. Replace the CMOS battery, if this is the case.<br /> <p><br /> <p>CMOS Error Message<br /> <p>1. Look for error messages like "CMOS checksum error", "CMOS Read Error" or "CMOS battery failure" when you start your computer. These errors are caused in the machines shut down for several months or when the CMOS must be replaced.<br /> <p><br /> <p>2. Let the computer on for 24 hours. Restart the computer and find the error.<br /> <p><br /> <p>3. Change the CMOS as the return error.<br />

on Jun 21, 2011 | Computers & Internet

1 Answer

Compaq startup ask to insert media disk
remove any pen drive or dvd disk or cd from the computer then restart the computer

Jan 17, 2013 | Compaq Computers & Internet

2 Answers

What function key gives entry to cmos

BIOS is fixed program that starts up the computer. BIOS is initialized during start up of HP Compaq-6715B which sets the computer settings to be uploaded. BIOS enables the creation of a bootable diskette, CD, or USB key that can be used to locally restore or upgrade the System BIOS in the supported notebook models with a 68YTT Family ROM. Only insert the USB drive that will be used to format and create bootable BIOS upgraded USB media. However, you should remove all unused USB drives and flash drives from the notebook before. In order to ROM family and ROM date, press F10 on the target notebook during startup to run the setup utility.

The tips to get into the BIOS of HP Compaq-6715b are:

  • Press F2 for setup
  • Shows logo
  • Independent of OS
Press F2 for setup

BIOS often has a blue background, and uses the arrow keys, PageUp, PageDown and enter keys to change the settings. After you have got into or accessed the BIOS, you can change the boot order settings so that the floppy disk is checked first to see if it contains a bootable program. Usually a message will appear telling you how to enter the BIOS setup program as the computer starts up, such as Press F2 for Setup.
Shows logo

Your HP Compaq-6715b might be configured to show your computer's logo instead of important BIOS messages. In this case, you can press Esc or Tab while the logo screen is visible. If you are facing problems pressing the pause button in time, turn on your computer with your keyboard unplugged. In this situation you will receive a keyboard error, which helps you in pausing the startup process long enough for you to see the keys necessary to enter BIOS.
Independent of OS

The PCs with both PS/2 and USB connections are configured to only allow USB input after the POST. If you are using a USB keyboard, it could be impossible to access BIOS. You would need to connect an older PS/2 keyboard to your PC to access BIOS. The BIOS accessing is independent of any Operating System on your computer because the BIOS is part of your motherboard hardware.

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Jun 25, 2012 | HP Compaq 6715b Notebook PC

1 Answer

Hi Everybody, My server Power Edge 650 asking to press F1 during every startup. How to get rid of this. Thanks Ezhilmani
Hi There.

Symptoms
* cmos checksum error messages
* error with date time error

Solution
* Replace CMOS battery.

Procedure

1. Locate your CMOS battery.


pcsyke_74.jpg

2. Turn of your Desktop.
3. Remove the power cable from your Desktop.
4. Press power button to discharge your Desktop from electricity.
5. Desktop should be laid down horizontally.


pcsyke_71.jpg

6. Remove the battery and avoid forcing.
7. Replace the battery with same model or equivalent.
8. Put the new battery firmly in the allocated slot. (Positive side should be visible).
9. Plug the power cabe and start up your PC.
10.Enter Bios by pressing DELETE or F2 and load defaults save and quit, it will reboot automatically.
11.Enter Bios modify settings save and quit.
12.The End

Hopefully this information helps.
Thank you for using FixYa.

Jul 19, 2011 | Dell Poweredge 650 - P4 3.0GHZ, 1GB/40GB...

2 Answers

I started my pc with no software and os loaded and I got the message: WARNING: CMOS checksum Error My motherboard is: DH61BE and the bios ver. is BEH6110H.86A.0020.2011.0218
This is an error that occures when the BIOS has lost the CMOS settings. This usually happens if the CMOS battery has drained completely.
The solution is to first try to reload CMOS settings. you can do this by pressing DEL at startup and getting into BIOS. then find the "reset to defaults" setting and reset the CMOS settings. This should solve the problems.
If that doesnt help, then you would have to change the CMOS batter on your motherboard. This is a quite simple task. It is a standard battery and is quite cheap.
Also some motherboards have a CMOS battery connector jumper, refer to your motherboard manual and check if you have this and reset it.
These are all simple tasks, but get someone to help you if you don't feel comfortable doing it yourself.


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May 22, 2011 | Computers & Internet

1 Answer

Hi i have laptop hp pavilion ze2000 the problem that while booting it asks me to press f1 or f2 to continu and when i press f1 nothing happen it seems like the laptop can not see the keyboard i replaced...
Try this links:
Troubleshooting No LED Lights Glow During Startup or Boot HP Notebook PCs - Troubleshooting Blink Codes or Beep Codes that may Occur During Startup or Boot , or BIOS Beep Codes - For Hp and Compaq Desktop Computers (United States - English) Troubleshooting Black Screen with no Error Messages that may Occur During Startup or Boot HP Notebook PCs - Troubleshooting Black Screen Error Messages that May Display During Startup or Boot HP Notebook PCs - Troubleshooting Blue Screen Error Messages that May Display During Startup or Boot HP Notebook PCs - Troubleshooting Windows Logo Screen Error Messages that May Display During Startup or Boot Using HP Support Tools to Update HP Software, Drivers, and BIOS with Windows 7 . Using HP Update Tools to Update HP Software, Drivers, and BIOS with Vista Updating the BIOS or ROM for Notebooks Running Windows XP Updating Drivers and Software with Windows Update

Nov 11, 2010 | HP Pavilion ze2000 Notebook

2 Answers

Computer will not boot up. I have tried to boot up in safe mode, normal, safe mode with prompt command...nothing works, just goes back to the normal start up screen and keeps doing the normal start up over...
It looks like you're encountering an endless reboot? Here's what to do to find the actual error message.

  1. Turn on the computer, and press F8 after the POST screen but before Windows attempts to start to access the advanced startup options.
  2. Select "Disable Automatic Restart On System Failure" and press Enter.
You should now get a blue screen with an error message and error codes. Please write these codes down and report back.

Mar 24, 2009 | HP Compaq Presario SR1830NX PC Desktop

1 Answer

When i start up my computer the only thing that shows on the screen is the red compaq screen. i try to press F8 upon startup but nothing happens, i have also tried F12 but still nothing, i have tried the...
try to CLR BIOS....or check cmos battery on motherboard or...replace cmos battery.
this problem related of cmos.
Thanks

Mar 05, 2009 | Compaq Presario 5000 PC Desktop

1 Answer

Startup/Shutdown
Have u attached a external monitor to the laptop?

Feb 17, 2007 | Compaq Pavilion ZV5120US (DZ329U#ABA) PC...

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