No such thing a monitors specific to Windows. All monitors are cross-platform.
They either need VGA or DVI connectors to be compatible across computer platforms.
You can't just use any ole' video card in a Mac.
It has to be a video card specifically for the Mac and is compatible with the model Mac you have.
You need a PCI video card that is a Mac edition PCI video card or a PC Flashed PCI video card that is known to work in Macs, too!
Before doing anything, go through the Mac and makes sure all of the RAM modules are seated down properly. Make sure the video card is seated down in its slot properly. Make sure any other cards that are in there are seated down properly.
It's possible the video card is either dislodge or bad.
If it's chiming, can you hear the hard drive spinning up?
The hard drive might be bad.
If you install another drive, you will need to to format it for Mac.You need either the original install discs or retail OS X discs to run the OS X Disk Utility to format the drives before trying to install OS X.
I did some research and you will need both OS 9 ( OS 9.1 or 9.2) and OS X 10.4 Tiger.
If you know someone who is an older Mac user to see if they have copies of these to use for installation.
They are very old, now if you find the original retail disc versions of these, they are going to be expensive to buy.
Probably more expensive for the OS copies than the Mac is worth, at this point.
The reason you need OS 9 is that you must perform a firmware update to the Mac's CPU before installing OS X.
The firmware updater can only be run in OS 9 and NOT OS X.
Any version of OS X will not install unless this firmware update is applied.
Note, this Mac may have has the firmware updater already applied. You won't know this until you can get OS 9 installed on this Mac.
It's not going to be easy getting this Mac to run without the original system disks and without knowing what is good or bad with this Mac.