Desktop Black Screen Issue

I. Check if the power cable connecting the AVR and System unit is tight.

II. Opening the right side of the case

II. Clearing the BIOS

a. remove the CMOS battery

b. Wait for 5 mins.

c. Return the CMOS battery

d. Try turning it on.

III. Reseat the RAM.

a. Push down the latch on the side of the RAM.

b. Remove the RAM

c. Align the notches of the RAM.

d. Push down on the RAM.

e. Make sure that the latch clicks