What should I do if there is no signal to the monitor after powering on?

Connect the monitor power cord securely to an electrical outlet and make sure the monitor is turned on, then try selecting different inputs on the monitor. If you hear 3 long beeps, remove all memory modules and install only one module in the DIMMA2 slot first and restart. If you hear 1 long 2 short beeps, remove and reinstall the graphics card and restart. If problems persist, test with another known working graphics card.