Tower powers up great,but monitor has no signal

You can try these Trouble Shooting steps:
Monitor Self Test:
1. Physically test the monitor autonomously from the computer.2. Switch both the monitor and the computer off, and then disconnect the VGA cable le from the computer.3. Turn the monitor on, pressing the power button for about three seconds. The self-test screen will come up .4. If the image is clear, bright, and shows red, green, and blue, the monitor is working properly. Video issues may be due to the video resolution in the computer, and not the monitor.5. If the image is not apparent and intense or the colors are not accurate, then the trouble is with the monitor or some of the (OSD) settings. In this case, test your particular monitor's information for OSD.

Safe Mode:1. Restart your computer. 2. Before the windows logo you should gently tap the F8 key repeatedly until you are presented with a Windows XP Advanced Options menu. 3. Select the option for Safe Mode using the arrow keys. 4. Then press enter on your keyboard to boot into Safe Mode. 5. Do whatever tasks you require and when you are done reboot to boot back into normal mode.

Video Card:1. Unplug all of the cables.2. Unscrew the tower.3. Remove the video card from the PCI slot.4. Use an eraser to erase the coper pins on the video card. It will remove the dirt from the pins.5. Insert the video card in the PCI slot.6. Screw back the tower.7. Plug back the cables.8. Turn on the pc. It should be working after these steps.

Thank you for choosing www.fixya.com.If you have any other issues under the sun, just post your questions here and we will provide you the answer.

Unplug power sources for the monitor and computer.

Hold down the power button of the computer tower for 10 seconds, this will drain remaining from the motherboard.

Plug back in the power sources for the monitor and computer tower.

Power on the monitor first, make sure the monitor power button will turn green then amber.

Power on the computer tower.

Try to check if you were able to see the Dell blue logo just right after you power on the computer.

If you were able to see the Dell blue logo then do these steps:

1. Turn off computer then turn it back on then immediately keep tapping on the F8 key. If options will appear please select safe mode.

2. If you were able to access in safe mode the problem we have is the video card driver needs to be uninstall then reinstall. To uninstall/reinstall the video card driver. Once you access the safe mode go to device manager then uninstall the display driver. Reinstall the display driver using the CD drivers came with the computer.

3. If you were not able to access safe mode then try again step 1, when you reach the option screen then select "last known good configuration".

If all fails from these steps, back up your HD files by asking a local tech to use an enclosure to copy all your data from your HDD to a different storage cause this will end up reinstalling the windows operating system.


Just in case just right after you power on the computer and it immediately gave you the message entering powe safe mode then you need to re-seat the video card which needs to open the side cover of your computer.

Re-seating the video card ut's just like taking it out from the slot then put it back again, make sure it's properly seated.

Boot into safe mode (press f8 wile it is booting up). When its on right click on desktop, Properties, settings and choose a resolution that matches your monitor.
regards

Apparently you set a video resolution which your monitor isn't able to handle. Try booting in safe mode by holding the F8 key at boot, then change resolution to something safe such as 1024x768. Reboot in normal mode and set the resolution you're most comfortable with.

lilsidetrack -

An obvious cause is that your video card may have taken a dive on you, and it needs to be replaced. If you don't "see" anything on boot up, but what you hear sounds like it's booting, your video card has probably gone bad.

Another possibility is that your video card's settings got changed accidentally, and it's not sending the proper signal to the monitors you've tried. Try booting into Safe Mode (if you have a Windows OS). This loads only the most basic drivers, and if it successfully enters this mode, indicates that your video card is probably OK, and setting might be the issue. Press "F8" during boot-up to get the boot menu, and choose Safe Mode.

You don't say what kind of card or monitors these are. Does your video card have a "TV-OUT" or "S-Video OUT"? If so, the video card is probably set to output to one of these other sources, and not to the monitor. Once in Safe Mode, you can go to you video settings and be sure they are set correctly.

Thanks,

videoman7

Video Card has a resolution setting higher than the monitor supports. The below works with XP, may work for Vista as well

Start the PC
Start hitting the F8 key repeatedly until you see a menu
Choose Safe Mode (make sure not to pick safe mode command prompt)
Once you see the desktop, right click on an empty area on the desktop, then choose properties

Find the resolution property in this program and bring it down. 1024 x 768 should be ok

Click on OK til the window disappears

Reboot

if the monitor goes into standbye when you plug it into the computer , it generally means there is NO signal coming from your video adaptor.
Plug the old monitor in , if it works, ide suspect the new monitor(s) are not working correctly.
if it doesnt work , you need to restart the computer in safe mode by repettitively tapping the f8 button as the computer starts, before it says "starting windows".
If you have a signal on your monitor in safe mode, then most likely you have a bad or corrupted video driver and it will need to be updated.
if you have no video in safe mode , you will need to remove the cover and physiclly check that all add-in card power cables and memory chips are squarly seatied in there slots. MAKE SURE YOU UNPLUG THE COMPUTER AND DISCHARGE ANY STAIC BUILDUP IN YOURSELF BY GROUNDING (TOUCHING) SOMETHING METAL BEFORE YOU TOUCH ANYTHING INSIDE THE COMPUTER.

AFTER YOU CHECK THESE THINGS AND TRECONNECT THE POWER AND TRY TO START......POST AGAIN HERE

Could be a could a couple of things

#1 Ensure the video cable is connected to the correct jack on the tower (Some systems have both an integrated video card and an Expansion card. See if there are 2 blue 15 pin vga ports, if there are 2, connect to the other one.

#2 You may be using DVI (White connection) and have the imput select set to D-Sub (Analog) Use the input select button on the monitor to sleect DVI

• Signal out of Range.
• Out Of Scan Range
• Horizontal frequency is out of range.
• Cannot Display This Video Mode Out of Sync

This issue may occur if the signal from the video adapter exceeds the scan range of the monitor. The video adapter setting for updating the screen (the refresh rate) is incompatible with the monitor.
you should reinstall your video drivers in safe mode.

To restart in safe mode repeatedly press the F8 key during the computer startup. This will bring a menu where you'll be able to choose safe mode.

LCD monitor 60 - 75 Hz

I'd try this monitor on a spare computer. It sounds like the video card (motherboard integrated or otherwise)is not putting out any video information or missing sync signals. The monitor must receive these signals or it will go into standy/sleep mode. If the computer has integrated (on motherboard) video, check your bios settings to see if it is properly enabled. If it has a slot video board, then try a different video board. Your present board might be dead. Another possibility is a bad cable connection. check the connectors for bent pins. Assuming the connector is the standard HDB-15, it is easy to bend a pin over.