Hi,
Follow the Below Tips,
The machine is getting powered on but no display
•Check the monitor is switched on and the power indicator LED of the monitor is glowing.
•Check the monitor power connection.
•Adjust the contrast/brightness knob of the monitor to maximum.
•Check whether the monitor is connected properly to the video adapter of the system.
•If your system has add-on video adapter, switch off the system and remove the power. Remove the screw holding the card in place and then remove the card from the expansion slot. Reseat the card into the slot, ensuring a firm connection. Replace the screw and reattach the monitor to the system. Now switch on the system and see.
•Check whether the CPU, memory are connected properly to the motherboard.
Rgds,
Sahab