Instructions
Replace the batteries in the DVD remote with a fresh pair or with batteries you are sure work. The PS2 remote uses AAA batteries. Press the "Power" button on the remote to see if the PS2 console responds.
Move closer to the PS2 console when pressing a button on the remote. This eliminates any possibility of the remote's IR beam being too far away. The further away from the console the remote is, the weaker the signal.
Ensure no objects are placed between the remote and the receiver on the PS2. The IR receiver is directly beneath the "Reset" button on the console. Point the remote directly at the console when pressing buttons.
Press one button at a time. Mashing several buttons at one time makes the remote functions inoperable.
Move the PS2 out of direct sunlight. The sun's rays overload the IR receiver, making the remote ineffectual.
Contact the remote's manufacturer if troubleshooting does not resolve the problem. If the remote was purchased within a year, you may be entitled to a replacement.