I have a Daewoo HL710S LCD Monitor that is Plug & Play and DDC 1, 2B (whatever that means)

It works fine with a Dell computer running Windows 2000 Professional.

I am now trying to hook it up to a Compaq Evo (D51S) that has Windows XP Professional

All I get is a “No Signal” message on the monitor and then it goes to sleep.

Also, the Compaq does not work with a ViewSonic ViewPanel VG181 (I also get the “no signal” message. But, the Compaq DOES work with another (more recent) monitor.

I have tried:
1. checking and rechecking and triple checking the power and video connections
2. resetting the refresh rate to 60 Hz.

HELP!

http://www.daewoointernational.ca/monitor/HL710S.shtml

Make sure the max resolution is 1280 x 1024

If this doesn't work, reduce the screen resolution down to 800x600
Reduce the colour depth to 256 colours

Try this.

Do you get anything whilst the PC is booting?

Does the monitor that works use a different connector?

Thank you so much for your kind assistance.

I assume the resolution settings are on the CPU, right? (sorry, I am not that computer competent). I will have to take the Compaq to my office where it works with my monitor in order to do the settings. Hopefully what you suggest will do the trick.

When the PC is booting, all I get is a black screen with "no signal" message. Then the monitor shuts off.

The Daewoo monitor uses the 15 point (blue) connector. The at-work monitor with which the Compaq does work uses the other (white) connector. HOWEVER, the VIewsonic monitor (which the Compaq also rejects) has both the blue and white connector options and the Compaq rejects both.

Make the compact can take both digital and analog monitors, much alike when you have 1 monitor with a digital and analog cable for two puters, so like you press the 'switch' button on your monitor and it switches displays.

Tried everything suggested below and I still get the "No Signal In" message. This is so frustrating! I don't know if it is cheaper to get a new monitor or to pay for a technician to figure out the problem...

Thanks for your suggestions. I appreciate you taking the time.

Quote:

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Originally Posted by StuMegu

http://www.daewoointernational.ca/monitor/HL710S.shtml

Make sure the max resolution is 1280 x 1024

If this doesn't work, reduce the screen resolution down to 800x600
Reduce the colour depth to 256 colours

Try this.

Do you get anything whilst the pc is booting?

Does the monitor that works use a different connector?

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It sounds like the graphics card on the Compaq PC does not have any output on the blue socket (analogue). I would be tempted to change the graphics card myself. A local PC shop should be able to do this for you relatively cheaply. Would this invalidate the warranty on this PC? Have you spoken to HP/Compaq about this problem?

Normally when you boot, if the graphics card is working it should display the boot process regardless of drivers so it could be faulty on the analogue port.

Speak to HP about this issue, if there is nothing simple to do, I would get a replacement graphics card in that machine.

I am going to try an adaptor for the white socket -- to see if I can connect the blue connector to the white socket. I know the white socket works -- I now got it working for the ViewSonic monitor which the CPU previously rejected.

The CPU is out of warrantly so HP won't talk to me unless I pay (I already tried calling). So, getting a local technician to replace the card won't impact the warranty. If the adaptor doesn't work, I'll take the computer in.

Thanks again for your help!