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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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Re: troubleshooting a computer that doesnt start

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. - 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.
Replace a CMOS battery inside a desktop computer Troubleshooting/Remove the CMOS battery to reset the bios password.htm

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


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 | PC Desktops

1 Answer

Why won't my COMPAQ PRESARIO SR2032X desk top

Please turn off the computer, start hitting F8 at the start-up and then choose last known good configuration. If this does not work, choose Safe mode options.
If still does not work, please try to restore the computer to factory settings. You can try to hit F11 or F10 at the startup to initiate recovery.
If not working, please tell me what error message you get on the screen.

Jun 01, 2013 | PC Desktops

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 PC Desktops

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.

* cmos checksum error messages
* error with date time error

* Replace CMOS battery.


1. Locate your CMOS battery.


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.


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.

--------- Please rate the answer if it was helpful. Thank You!

May 22, 2011 | PC Desktops

1 Answer

Item wont power up, it give error message

Repair PC
press delete at startup
go2 BIOS option

At start up press F8 go2 SAFE MODE thn type at run chkdsk,chkdsk/f/r & thn restart pc
Else Repair XP
Else clean ram BY RUBBER

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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.

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Compaq evo n1050v laptop rebooting on XP startup

When you start it hit the f8 key,highlight safemode without networking.If it boots do a system restore.

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