How to Diagnose and fix the CD/DVD drive not detecting problem on your PC

Some times you might have faced problem with your CD/DVD drive, which will ot detect properly
Reason:
The registry entry of your disc burning software might not have removed properly
Due to hardware error (The CD/DVD drive might have become totally unusable)
Fix:
In Run window, type in: regedit and press Enter
At the Registry Editor window, locate, and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
If the Upper filters key is available,right-click and delete it.
and in the same way delete the Lower filters key also
close registry editor
If you want  to accomplish the steps above automatically, try this  FixIt from Microsoft
This should fix the problem if the issue is with the filter buffers.
try checking the power and data cables of the CD/DVD drive. make sure the cables are properly connected.
If the above doesn’t fix the issue, replace the CD/DVD drive.

How to diagnose and fix the display problem on Desktops

Your desktop  may not display properly due to following general reasons

Improper power supply

Improperly connected Power and Display Cords

Improperly connected Display ports

Troubleshooting:

Make sure the power supply is connected and the power buttons are turned on

Reconnect the display and power cords and ensure the connections

Check the quality condition of display and power cords. if required, replace the cords

Identify the correct graphics port (display port/ DVI/VGA) and connect to it (All these port cables will only fit into its exact port)

Try connecting your desktop to a different monitor and if you identify your pervious monitor is faulty, replace it.