I have desktop pc motherboar asus m2m ddr2 ram display not come extra display card attached but display not com in moniter when press on keyboard num lock o n off system boot ok but display not come in moniter

SOURCE: Intel Dual Core 2.0 GHz Sytem hangs after boot

During your boot screen press the F8 key to boot into safe mode. If that gets you to the desktop run virus/spyware scans. Reply with any results.

SOURCE: IBM Lenovo doesnt start

Sounds like your graphics card and display are not properly communicating. If the card doesn't sent out a signal to the display, you will see nothing on the screen. Did you check the graphics card on another machine using the same display? If so, something different may be wrong. I am assuming your display is powered on and plugged in properly. If there is more than one video connector on the machine, you may have it plugged into the inactive video connector. If all of this checks out I suspect you have some hardware problem with the system unit.

CrazeeRay

• 13 Answers
• Posted on Feb 08, 2012

SOURCE: HP IQ770, won't boot, only displays HP Logo screen

Hi, this is the best solution ever- i was surfing all the possible forums- found THE SOLUTION for my HP TouchSmart IQ770 not booting up, freezing on hp logo with blue screen and non functional keyboard.... the problem is in... you wouldn't believe this- card reader!!! disconnect cable from reader board, NOT from motherboard side and power up! Here is link for detailed explanation- scroll down to johnnyzero comment - HE IS THE REAL HERO!!! http://www.tomshardware.com/forum/256184-28-pavillion-start-bios-info-start

SOURCE: I have HCL Ezeebee desktop computer when we boot the system monitor, keyboard, mouse blink for a while and monitor (HCL) show 'no signal' message, and keyboard num lock led not display mouse i

No signal at the monitor indicates (if you know the monitor is working ok) a failure of the graphics chip or graphics card, The lack of indicator light on the num lock LED and the lack of power to the mouse would indicate that there is a major issue with the motherboard.
you can try using another monitor to confirm the problem lies with the graphics, and in the case of the keyboard and mouse, swap them for a usb version, if they work, the Ps2 ports are probably damaged.
I'd be thinking of replacing the motherboard