PRINCETON LCD 19 IN MONITOR. WHEN TURNED ON SCREEN FLASHES OFF AND ON AND MAKES A NOISE EACH TIME IT FLASHES OFF AND ON. AFTER SEVERAL MINUTES STAYS ON AND WORKS FINE.

Did you try this monitor with another PC and already verify that the VGA cable is OK.
Common problem with Princeton monitors are due to bad DC filter capacitors in the power supply board, see example here:

http://s807.photobucket.com/albums/yy352/budm/PRINCETON/

Try to decrease your screen resolution. see attach picture: or restart your computer then if windows xp booth press F8 then choose ENABLE VGA MODE. press enter.

That is the problem with the standby section of the power supply. A continuous flashing indicate a shorted component usually a small diode.

More likely to have failed DC filter caps, see pictures here: http://s807.photobucket.com/albums/yy352/budm/Princeton%20VL1918W/

Basic LCD monitor and LCD TV troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV, Monitors, Caps : http://s807.photobucket.com/home/budm/allalbums

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitor kits: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Please post back what you find.

david78910, First disconnect and reconnect the monitors VGA plug from pc vga port a few times to make sure of good connection at the port. Report back here with results! If that doesn't fix your "pink screen" symptom, then possible bad inverter supply inside unit or the CCFL tubes may have lots and lots of "on" hours use on them and need to be replaced. Yes, you could also have bad (almost dead) switch-mode-power-supply inside unit if "known-good" monitor works perfectly with your pc. 12fixlouie

You may have bad filter capacitors in the power supply.
You need to open it up and inspect the inside, see some pictures here for guide: http://s807.photobucket.com/home/budm/allalbums

Cheaper to replace than repair.

tiene que hacerle una revicion a la fuente de poder puede que este el voltaje muy bajo

just press the fn + F5 buttons and screen will appear

If you feel confident take the monitor back cover off and replace the 3 bulged out capacitors