A keyboard locks up intermittently even when replaced with a new keyboard. What is the LEAST likely cause of the problem? A. A second bad keyboard B. The keyboard controller chip C. The keyboard connector D. The motherboard E. None of the above

The correct answer is: A. A second bad keyboard

The keyboard locks up intermittently even when replaced with a new keyboard. This suggests that the problem is not with the keyboard itself, but with something else in the computer. The most likely causes are:

• The keyboard controller chip: This is a small chip on the motherboard that is responsible for controlling the keyboard. If it is faulty, it can cause the keyboard to lock up.
• The keyboard connector: This is the connector that plugs the keyboard into the motherboard. If it is loose or damaged, it can cause the keyboard to lock up.
• The motherboard: This is the main circuit board in the computer. If it is faulty, it can cause a variety of problems, including keyboard lockups.

It is very unlikely that both the keyboard and the new keyboard are faulty. Therefore, the least likely cause of the problem is a second bad keyboard.

Here is a more detailed explanation of each option:

• A. A second bad keyboard: This is the least likely cause of the problem, as it is very unlikely that both the keyboard and the new keyboard are faulty.
• B. The keyboard controller chip: This is a small chip on the motherboard that is responsible for controlling the keyboard. If it is faulty, it can cause the keyboard to lock up.
• C. The keyboard connector: This is the connector that plugs the keyboard into the motherboard. If it is loose or damaged, it can cause the keyboard to lock up.
• D. The motherboard: This is the main circuit board in the computer. If it is faulty, it can cause a variety of problems, including keyboard lockups.

If you are still experiencing keyboard lockups after replacing the keyboard, it is recommended that you take your computer to a qualified technician for further diagnosis and repair.