Computer on start up makes noise and the 3 & 4 and battery icon light up and nothing comes up on monitor.

The coin cell battery inside the laptop needs to be replaced

Sounds like either there is a bad connection from the computer to the monitor, or the monitor has a faulty power regulator, causing the monitor to overheat prematurely, and shut off.

If the power light does not come on and it makes a screeching noise, most likely its broken. I would contact the manufacturor, in case some warranty left.

Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.

is the monitor making the clicking noise or your computer

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive
Test the leads that attach to your ((hard drive from the motherboard)) or replace all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your ((motherboard to hard drive))
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error


hope this helps

> couldn't get it to work with an external ... monitor

With the computer turned-off, connect the monitor to the SVGA port.
Turn the computer on -- the usual "start-up" messages should flash on the LCD screen.

Or, take the laptop into a darkened room, to see if the usual Windows "desktop" icons & wallpaper are dimly visible.

Or, take the laptop & the power-supply to a qualified technician, for professional trouble-shooting.

So basically your monitor's power supply system died.
Nothing much a non-technician could do about it.
Get it repaired, if under warranty, get a replacement before the coverage duration expires.

what u may have done is wwhen u were installing the new board, gave a static shock to the system...that will cause only the fans to come on and nothing more...this is a bad problem bc u cannot fix it...if u figure out something else is wrong, and it gets fixed, let me know

Computer beeping at you is usually a problem with the video card or memory. Try re-seating both and see if you still have the same problem. If you do, individually remove each component and power on to test if the beeps persist.

Something has failed or is failing in the monitor. It may be serviceable, but may not be cost effective to do so unless something has just come loose. I'm assuming you have no problems with the new monitor. Your time line is a little confusing.