I need a driver for a compaq 5187-5023 keyboard driver and a Optiquest Z90 monitor driver for windows 7 64.

Boot into safe mode ...not sure what windows version you have but Google boot with safe mode with windows version windows 10, 7 XP etc
You should see the bios before windows loads. If it turns black when windows is loading bad DIsplay settings or driver.

Hello,

The Viewsonic VG1921wm monitor uses the same power supply board that the Optiquest Q19w uses. When that monitor has display problems like you are having the most common cause is bad capacitors on the power supply board. When the capacitors go out the power board does not put out the correct voltages to drive the back light circuits and the driver circuits so you get no display. There is a very good chance that this is the problem with your unit and it would be worth having a look at the power supply board. Here is a link to a repair guide for the Optiquest monitor and since they use the same power supply board it should help you check you board and show what needs to be replaced to repair it.

http://www.ccl-la.com/blog/index.php/how-to-repair-a-optiquest-q19wb-monitor/

I hope this helps.

In that case you need to buy a new lcd monitor.

You need to download the driver from DELL for your video card, my 3000 use video driver R79733.EXE.
You may have virus in your computer if you cannot update the drivers, sometime it is better to start from clean drive to help get rid of stuff that get installed into the computer.

Go into control panel / sounds / sounds and audio / select audio blind / should see a driver listed in each device. Back to sounds blind /test sound, if you can see the black arrow but its greyed out then driver is faulty. If you can click on it and it changes baxk to th esquare all is OK, ensure the sound jack is plugged into the GREEN ones at rear PC. Also check in volume blind that speakers are selected.

It appears your video driver has become corrupted. You need to boot into safe mode go to device manager and UNINSTALL "Display Adapter" then reboot. Hopefully windows will install "Generic" Video driver and it will boot up normally. Then you can download the latest drivers for your card and reinstall.

Is there a rca/headphone jack for the monitor? Make sure that the jack is plugged into the computer's audio out rca jack. A driver should not be needed for the audio on the monitor. If the jack is plugged in make sure that the audio is not muted on the computer. Right click on the speaker icon in the right bottom of the screen on the windows tray nand open the sound mixer. Make sure all the sounds are on. Then check the monitor settings and make sure the sound is on and not muted thru the monitor buttons. If the cable is good and all these things are ok then the internal sound amp in the monitor might be bad.

replace pwr inverter board...
replace the video/keyboard as well...

The monitor is defective and should be repalced. Keyboard and mouse pad problem could be a driver problem. Try to reinstall their drivers.

At a guess it is the refresh rate the video card is sending to the video out. What is the Max Resolution of the monitors and refresh rate ??
I would think there is a program to be able to setup the driver refresh rate and resolution don't use window drivers get the ones from the makers of the card rather than using the default nivida drivers