8.If you installed a display adapter card in your computer, and you want to use that adapter as your primary display adapter, you need to change the setting of jumper J1 on the main system board to disable the built-in VGA adapter. Otherwise, you will not see any display on the screen. You may also need to set jumper J4. See “Changing the Jumper Settings” in Chapter 4 for instructions.

9.If you are still having difficulty with your monitor, run the Video diagnostic tests, described in Appendix B. If the diagnostics program indicates an error, contact the place where you bought the monitor.

Diskette Problems

If you see an error message or have trouble accessing data on a diskette, try the following steps:

1.You may have inserted the diskette upsidedown or it may not be inserted all the way. Remove the diskette from the drive and reinsert it with the label facing up. If the diskette drive has a latch, be sure to turn it down to secure the diskette in the drive. (See Chapter 1 for detailed instructions on inserting and removing diskettes.)

2.If reinserting the diskette does not solve the problem and you have access to another diskette drive of the same type, place the diskette in the other drive and repeat the operation. If this works, the trouble may be in your diskette drive. See “Diskette Drive Problems,” below.

3.Check to see if you have inserted the right type of diskette. For example, are you trying to read a 1.44MB diskette in a 720KB diskette drive? See “Types of Diskette Drives” in Chapter 1 for more information.

C-12 Troubleshooting