Monitor randomly goes black, says no signal if I turn it off and on, and signal wont come back until after I reboot pc. Pc looks like its still running during and after the screen going black.

In regards to your issue with your monitor: For a monitor to display "no signal input" there is likely a problem with the monitor making a connection to your input source (yes I know duh). First and easiest thing to fix this is to check your cables going between your computer and monitor, if your computer and monitor start out working and then fail to communicate, there is a good chance that the cable might be coming loose just enough that the connection fails. I might suggest that if you have, as you say another computer, that you try swapping monitors to check where the problem lies.

Hope this helps some.

all you need to do is update the drivers for monitor or the monitor is going out just go your hardware and click on the monitor then update drivers it will tell you if it is working properly

Hi, Have u tried removing the RAM and CMOS battery and then again put it.

This means the monitor believes it's not connected to the computer. Verify the cables first of all. Then try booting in safe mode (F8 key at PC startup) in order to verify that the PC is sending data to the proper video port (you might have a dual VGA / Digital output, for example, and the monitor might be connected to the wrong PC port). Quite often, a "bad signal" will be the same of "no signal"; and you can have a bad signal if the monitor resolution on the PC is set too high. This could happen if you installed a high-resolution capable monitor, and then replaced it with a not-completely-plug-and-play, lower resolution one. The PC would keep sending hi-res signals to a monitor which can neither interpret them, nor tell the PC "please slow down". To check this last possibility, reboot your computer while the monitor is ON. When PCs reboot, they usually drop back to standard VGA signaling, which all monitors understand. If the monitor abruptly comes to life and displays a boot screen, then goes No Signal again after several seconds, you've got a resolution issue; get in Safe Mode with F8 key at boot, and modify the screen properties (right-mouse button on the desktop, then Properties).

If everything else fails, try also connecting the monitor to another PC or laptop, to see if it works there.

Try to set your PCI-E card as a first one in BIOS. There also should be an option to turn off onboard video.

I found your other posts regarding this problem. I believe it may be that your monitor is failing. Do you have another monitor to try? Another clincher is to start the computer, do the login, and when the monitor goes dark, turn off it's power button, and turn it back on after waiting for 30 seconds or so. If the monitor lights and looks normal then goes back off, it's the monitor at fault.

If you're working on the computer when that happens, it's not probably a power setting. Try to update your BIOS to the most current version at the toshiba support website (support.toshiba.com) & see what happens. Fixes the issue most of the time

I hope this helps.

Try using another monitor that you know works. Then try another video card. The fans are running because the computer is running ---but the monitor is not. Green to Amber means monitor is not on.
A lot can go wrong with loose wires that shouldn't be loose.
But I would try this first.

well use that other card in 60 hertz mode are u not 75 hertz

It sounds like there's a problem in the power supply or inverter section and it's just teetering on the edge of failure. The disruption of the signal is apparently just enough to kick it over the cliff until it's reset. Sooner or later, it'll need some help, like connections, capacitors, output transistors, capacitors, transformers. Those are the most common failures in these. I think you'll see it get worse