I have aLikom HD19A LCD monitor. The problem is when the pc first boots up the power light would stay on standby until you power off and pwer on the monitor. The light turns Green until Windows boots up and I get the No video signal window. I power off and power on the monitor and the light turns grenn and I got signal.. The monitor worked normaly when I first install it. I've tried a different videocard and check the bios settings and the monitor still has the problem
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Make sure you have the cable that plugs into the back of the computer from the monitor screwed in tight. Also make sure the cable on the back of the monitor is screwed in tight and also that the power cord on the back of the monitor is pushed in all the way.
I'm almost certain you're not in standby mode. Does the computer stay on when you get the no signal message? Do you hear the fan blowing, do you hear the disk drive spinning? If not, I think your system has completely shut down. I'm thinking maybe a virus or some hardware/software conflict is stopping it from completing the boot cycle.
Try getting into the Bios or System Setup to see if the LCD Stays on and the computer stays on. Turn the computer off, then hit the power button to turn it back on. Look at the lcd screen and it will tell you what key to hit to go into the Bios or System Setup. Go into it and let the computer sit for 10 minutes or so to see if it shuts itself off.
If you are successful with the computer staying in the Bios or System Setup lets try getting into Safe Mode and see what happens. Turn the computer off and hit the power button to turn it back on and immediately start hitting the F8 key repeatedly until you see the SAFE MODE option. Select the Safe Mode option and let the system boot up. Safe mode will look different to you. The icons will be bigger and the lcd screen darker, but that's normal. If you are able to see the desktop in safe mode just try opening up MS Word and maybe let it sit for a few minutes to see if it shuts off.
If safe mode was successful, then try booting it normally. If it fails, we know we've got an issue.
Try booting the pc in safe mode (press f8 at startup). It may be possible that the pc is trying to send too high a resolution to the monitor...unlikely though. The symptom you describe usually indicates that the power board or the inverter board in the monitor are defective. If it does the same thing in safe mode, you have 2 options.
1. Replace the power board and inverter board (do the inverter board first.......it's the cheaper one (10-20 dollars). 2. Send the monitor back to the seller for a refund, or get a new monitor.
Sorry I couldn't give you more positive feedback. Hope this helps.
I was called to repair similar incident last week. A Compaq box (don't remember the model) with a 'smart' usb keyboard. By this I mean that the keyboard had a row of what I'll call hot buttons. The client had pushed a button with a moon on it causing the monitor to go into sleep mode. I suspect that whatever key you pushed had the same effect.
After plugging a known good monitor into the faulty box I verified that the box was OK. This left me to think the monitor itself had a problem. Plugged the suspect monitor into a known good machine.. and it worked fine!!!
Set machine and monitor to original configuration and still had no video. Decided that the monitor was too smart for its own good and maybe there was something in the monitors menu. Pushed and held the 'menu' button on the monitor for a few seconds and menu comes forward. Green power led also comes on (surprising me) so I powered up the computer and lo and behold the problem is fixed!