No signal on monitor for hp dc-7700

Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program.
This error means the contents of the BIOS code itself are damaged.

The BIOS ROM chip on the motherboard is probably faulty.
It could also be another component on the motherboard.

Make sure the battery has plenty charge or remove the battery for a while, about 5 minutes to see if that restores it some motherboards cmos batteries are soldered in

You could check the site for the machine vendor to see if there is a reset jumper.

If that doesn't work then you will need to refresh the BIOS

You should make sure that all of the BIOS settings in the system are correct, by rebooting the system, going into BIOS setup and double-checking all the values hopefully against a recent

If you have reset the CMOS memory you need to go into the BIOS setup screen and reconfigure the BIOS.

To do that you need to press a key while the computer is booting Usually the Delete or F2 but can be other keys
It should tell you on the bottom of the first screen which key to press to enter BIOS setup.


If you don't know the settings the should be one for optimal defaults - use that one.
You will also need to reset the time and date.
.

In the main or system setup screen you should be able to see the date and time Using your arrow keys navigate to the date and change the date. Once highlighted on the month, day, or year, press your arrow keys or your page up / page down keys to change the date.

Press F10 Save, Exit and re-boot and everything should then work
hope this helps

You need to go Bios setup and then reset the boot option, choose first boot as CD/DVD and then save settings and reboot now. Your issue have been resolved.


Good Luck

This error is not the same as a CMOS Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program.
This error means the contents of the BIOS code itself are damaged.

The BIOS ROM chip on the motherboard is probably faulty.
It could also be another component on the motherboard.

Make sure the battery has plenty charge or remove the battery for a while, about 5 minutes to see if that restores it some motherboards cmos batteries are soldered in

You could check the site for the machine vendor to see if there is a reset jumper.

If that doesn't work then you will need to refresh the BIOS

You should make sure that all of the BIOS settings in the system are correct, by rebooting the system, going into BIOS setup and double-checking all the values hopefully against a recent

If you have reset the CMOS memory you need to go into the BIOS setup screen and reconfigure the BIOS.

To do that you need to press a key while the computer is booting Usually the Delete or F2 but can be other keys
It should tell you on the bottom of the first screen which key to press to enter BIOS setup.


If you don't know the settings the should be one for optimal defaults - use that one.
You will also need to reset the time and date.
.

In the main or system setup screen you should be able to see the date and time Using your arrow keys navigate to the date and change the date. Once highlighted on the month, day, or year, press your arrow keys or your page up / page down keys to change the date.

Press F10 Save, Exit and re-boot and everything should then work
hope this helps

some bios problem try reset bios given method
The easiest way to clear the CMOS is to enter the BIOS setup utility and choose to "Reset BIOS Settings" to their factory default levels
Yet another way to clear the CMOS is to reseat the CMOS battery. By removing and then reinstalling the CMOS battery, you remove the source of power that saves your computer's BIOS settings.


apply any method and try

Pull the ram memory out one at a time and test each by powering up.

Put the CD/DVD in the machine and re-boot it. If it doesn't readt it from the start you'll need to change the boot drive order in the machine's BIOS Setup which you get to when the machine is just starting up (look for the key to press during the boot up process). After you set the CD ROM to be the first boot drive - the recovery disk should boot the machine and get you going.

Your BIOS settings may be wrong, or there may be a problem with the motherboard of the system.

I would check the BIOS settings on the laptop first.

When you first turn on the laptop - you might see something that says something like "Press F2 to enter Setup" or "Press Del to enter Bios" or "Press F1 to enter Setup" - or something along those lines. You will want to hit whichever key it is specifying and try to get into the BIOS/Setup.

Once you are in the BIOS, look for an option to restore defaults or reset factory settings. Do that and then save the changes and restart the computer.

If resetting the BIOS doesn't help, make sure that when you turn the computer on you are not plugged into a network cable at all.

If the system still gives the PXE error - then it is likely that something has gone wrong with your laptop motherboard. Unfortunately to get that fixed - you'll need to take it to a computer repair shop.

I hope that you can get the BIOS reset and it works for you though!

Hi,
Welcome to Fixya. You can use the 2 methods below to try to fix the issue
Method 1 - Update BIOS Firstly, if you can get past the error and actually boot into the OS, then you want to try and download the latest version of the BIOS. If you can't get past the error, make sure you try to load the computer in Safe Mode and see if the OS loads.
Another thing you can try is to enter the Setup and disable the wireless component on the laptop. Then try to restart the computer and see if you can get past the "unsupported wireless network device" error.
If so, go to the HP update site (http://www.hp.com/#Support) and type in the model number for your HP laptop. Download the latest version of the BIOS and install it!
Method 2 - Reset the BIOS If that doesn't work, you'll have to try resetting the BIOS. In order to do this, you have to restart the HP computer and then press the F10 key while the HP logo is showing. Press it a couple of times during the initial boot up if you can't get in immediately.
Now go to the Exit menu and select Load Setup Defaults. Finally choose Exit saving changes.
After resetting the BIOS, you'll have to perform an OS repair install. This is a pretty long guide in itself, so I'll direct you to a great post that walks through each step in performing the repair install. Not that it will NOT delete any of your data or programs.
Just let me know what happen. Thanks

To restore the BIOS default setting, open the BIOS Setup screen as follows:

(i) Turn off the computer and wait five seconds.

(ii) Turn on the computer.

(iii) When the first screen displays:

(a) Immediately press the F10 key if your computer was built in 2006 or later (came with Vista).

(b) Press the F1 key if your computer was built before 2006 (XP or earlier). Press the key once every second until a BIOS Setup utility screen opens.

NOTE: On some Compaq Presario computers (before 2002), press the F10 key at the logo screen.

(iv) After the Setup Utility screen opens, press F9 key to select and load the BIOS Setup Defaults .

(v) Press F10 to Save and Exit .

(vi) Using the arrow keys select Yes and then press Enter when asked Exit Saving Changes?.

Hello,

Try go to bios setup and then try resetting bios by selecting the bios default setting. and then look up for the configuration regarding your monitor setting or try to enabled that setting.

You can manipulate the bios setting ...don't forget to save the setting.

then try rebooting the system.
melnavz