No signal, Gateway 506GR

check the video cable between the computer and monitor (plug in)
are there and beep codes?

Please provide the brand name of Bios Utility and Bios ver.

http://www.driverscape.com/manufacturers/gateway/laptops-desktops/506gr/12363

Try turning the monitor after the pc is on. I have one monitor that shows that message if it is turned on before the pc is. If that doesn't work then there's 2 things i can think of. One is the cable is damaged, big issue if is integrated, and second the video card. Even if it is integrated you can get a replacement one and disable the first one if it gives you problems.

Does the "broken" PC Beep. How many times ? That's called a post code and different BIOS have different codes.
Check the Beep code based on the PC BIOS (check gateway's site or open the case at your own liability and read the BIOS chip label).
If the POST code indicates video replace the card and disable the integrated video if it's on the motherboard. On some BIOS's 3 beeps is bad video on others it different - you have to find the BIOS's POST sheet.
If it's a normal POST code for that BIOS then..... hmmm dunno - replace the video card anyways ? ;-)

The 506GR has an old Intel (Augsburg) motherboard, and onboard video. The hardware is from 2005, and has no support for Windows 7. Unfortunately, you will need to upgrade.

Item Description Item Description A Rear Panel I/O Ports M Front Chassis Fan Connector B Auxiliary 12-V ATX Connector N Serial ATA Interfaces C CPU Socket O Front Panel Header D CPU Fan Header P Front USB Connector E Memory Slots Q Front USB Connector F Standby Power Indicator LED R Front Panel IEEE-1394a Connectors G Floppy Disk Drive Connector S Speaker H ATX Power Connector T PCI Express x1 Connector I Parallel ATA IDE Interface U Front Panel Audio Connector J Battery V PCI Slots K Intrusion Switch Header W Rear Chassis Fan Connector L BIOS Configuration Jumper

Try tapping the F8 key while booting the computer, you will get the start up menu, choose safe mode, when you log on, go to the display settings, that is right click on the desktop, properties, screen saver, advanced and make sure that hibernation is off, along with turn off disks or whatever , probably see turn off monitor after XX minutes, I make ours 15 minutes (150 computers and servers), I don't let the disks turn off. Choose always on also, not home/office. Try this and see if these settings help.
1r1sh
A+
Net+
MCP

I had the exact same problem!! Drove me crazy for days. Couldn't find any answers online, contacted Gateway tech support and they told me my warranty was expired but they'd be happy to discuss my issue for $2 per minute. Gateway can **** it!!

At first I thought the problem might be a malfunctioning NVIDIA card, a problem with my DVI cable, or the monitor itself. But, after turning off the computer, unplugging the DVI cable, replugging the DVI cable and restarting the computer, I noticed I could get the firmware flash screen to show, including the BIOS menu boot and the Gateway system reinstall screen to show. As soon as the Windows flash logo would display, however, the monitor would drop out and display the dreaded "No Signal" error.
This indicated the problem was a software one and not hardware! The cable, monitor and video card were all working fine. Then I remembered that Windows installed its automatic update a few days prior. In fact...

THE PROBLEM TURNED OUT TO BE A WINDOWS UPDATE INSTALLED A FEW DAYS PRIOR.

After succesfully booting into safe mode (F8 during the flash/bootup screens), I went to Add or Remove programs in the control panel, clicked on the "Show Updates" box on the top, and uninstalled the Windows update from a few days prior to the occurance of the error. After a reboot the problem was solved.

I hope this will help anybody else struggling with this error!

Well make sure abt the Rams and the Video cards first, Remove your Rams and video cards and install them back.,,,,,, And make sure ur monitor is working as welll .....