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PC runs, but "no signal" msg on monitor

By dan ·
Recently, I built a home-theater PC (HTPC) with the following components:

Motherboard: ASUS A8N-SLI Socket 939 NVIDIA nForce4 SLI ATX

CPU: AMD Athlon 64 3200+ Venice 1GHz FSB 512KB L2 Cache Socket 939

Memory: 1GB (2x512MB) SDRAM Unbuffered DDR 400 (PC3200) Dual Channel

Graphics Card: eVGA GeForce 6600 256MB TV-out/DVI/HDTV PCI-E Heatsink Edition

Operating Sys: Microsoft Windows XP Media Center Edition 2005

HDTV Tuner: DVICO FusionHDTV5 Gold Plus

Monitor: Samsung HL-R5668W 1080p HDTV connected to PC via VGA cable

I'm running Microsoft Windows XP Media Center Edition (w/ all the most recent updates from Microsoft) and use a Samsung TV as a monitor via VGA cable between the GeForce 6600 graphics card and the Samsung TV.

Unless it's doing something, this computer is always in standby mode. I run an application that automatically wakes-up the computer and records high-definition TV shows for me. The monitor (Samsung TV) is usually powered-down while the computer is recording.

This system runs great except for one issue. Here's what happens:

- Computer running and recording as intended; monitor not powered-up.

- While the computer is running, I power-up the monitor.

- Monitor always displays "no signal" error message.

- Computer continues to run and record as intended.

No matter what I do -- including powering the Samsung TV up and down and unplugging and replugging the VGA cable -- the computer refuses to display anything on the screen. I'm sure the computer is running, because the TV shows being recorded are always OK, and I can "see" this computer from other computers on my wireless network.

It seems like the motherboard doesn't "enable" the graphics card to create a display signal when the monitor is off.

Any suggestions on how I can get the motherboard to "wake-up" the graphics card when I turn on the monitor while the computer is running?


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similar problem

by cahambing In reply to

i have a similar problem but changing the vga cable didn't help solve the problem. i have an asus notebook s5200n series w/ nvidia something video card. my output monitor is sony kdl-52xbr3. problem is sometimes, the signal is transmitted to the tv and sometimes it just says no signal at all and usually i have to wait another day to turn on the tv and computer to have the problem fixed but recently, my tv doesn't catch any signal at all. my notebook was able to detect the tv fine as "flat panel 1024 x 768 monitor". anybody have experienced and solved this problem? thanks.

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wow. good info. thanks for posting the answer

by sgt_shultz In reply to
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by gd07paul In reply to PC runs, but "no signal" ...

There is a few things i have tried that brings back the monitor.I still have the "no signal" after my cpu boots up,then one of my monitors just goes to sleep and i cant bring it back.But this list here has brought it back temporarily.

1. roll back the video card drivers.
2.Make sure that sleep mode for the monitor is set to always on,in the power Managment.
3. reinstall the onboard chipset.chances are the onboard video drivers are currupt.
4.Turn the power off of the monitor,Power down the pc,then boot up the pc as well as the monitor once again to let it identify the connection.
I hope this helps.It seems this has just started to happen to me since "Vista" has come out?
go figure!Im still on XP.

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