4.2.1 Display Problems
+------------------------------------------------------------------------+
¦ PROBLEM ¦ ACTION ¦
+--------------+---------------------------------------------------------¦
¦ Blank screen ¦ Check to see if: ¦
¦ plus no ¦ ¦
¦ beeps. ¦ 1. The charged Rechargeable Battery is correctly ¦
¦ ¦ installed. ¦
¦ Note: If ¦ ¦
¦ you are not ¦ 2. The AC Adapter or the Car Battery Adapter is ¦
¦ sure about ¦ connected to the computer and the power cord is ¦
¦ the beeps, ¦ plugged into a working electrical outlet (see page ¦
¦ turn the ¦ 3.1.1.1 on how to use the AC Adapter). ¦
¦ computer ¦ ¦
¦ off, then on ¦ 3. The power switch is on. ¦
¦ again. If ¦ ¦
¦ no beep ¦ 4. On is specified for the System audio option of the ¦
¦ sounds, the ¦ Set Features Menu. ¦
¦ speaker icon ¦ ¦
¦ is not ¦ 5. The math coprocessor just installed is installed ¦
¦ displayed. ¦ correctly. ¦
¦ ¦ ¦
¦ ¦ If the above items are correct and the screen still ¦
¦ ¦ remains blank, have the system serviced. ¦
+--------------+---------------------------------------------------------¦
¦ Blank screen ¦ Check to see if: ¦
¦ plus one ¦ ¦
¦ beep. ¦ 1. Both brightness and contrast controls on the LCD ¦
¦ ¦ display are properly adjusted when an external PS/2 ¦
¦ Note: Any ¦ display is not attached. ¦
¦ beep is ¦ ¦
¦ always ¦ 2. An external PS/2 display is turned on and the ¦
¦ accompanied ¦ brightness and contrast controls are turned up. ¦
¦ by a display ¦ When an PS/2 display is attached, the LCD remains ¦
¦ of the ¦ blank. ¦
¦ speaker ¦ ¦
¦ icon. ¦ If the above items are correct and the screen remains ¦
¦ ¦ blank, have the system serviced. ¦
+--------------+---------------------------------------------------------¦
¦ Blank screen ¦ If the dew point (humidity) icon or the temperature ¦
¦ plus two or ¦ icon does not turn on, have the system serviced. ¦
¦ more beeps. ¦ ¦
¦ ¦ ¦
¦ Note: Any ¦ ¦
¦ beep is ¦ ¦
¦ always ¦ ¦
¦ accompanied ¦ ¦
¦ by a display ¦ ¦
¦ of the ¦ ¦
¦ speaker ¦ ¦
¦ icon. ¦ ¦
+--------------+---------------------------------------------------------¦
¦ Only the ¦ Have the system serviced. ¦
¦ cursor ¦ ¦
¦ appears. ¦ ¦
+--------------+---------------------------------------------------------¦
¦ Screen is ¦ Check to see if the screen is still unreadable or ¦
¦ unreadable ¦ distorted by changing a value for the LCD display mode ¦
¦ or ¦ option of the Set Features Menu. See page 3.8.3.1. If ¦
¦ distorted. ¦ this action does not solve the problem, have the system ¦
¦ ¦ serviced. ¦
+--------------+---------------------------------------------------------¦
¦ Wrong ¦ Have the system serviced. ¦
¦ characters ¦ ¦
¦ appear on ¦ ¦
¦ the screen. ¦ ¦
+------------------------------------------------------------------------+
PS/2 Model L40 SX Quick Reference
Display Problems
¦ Copyright IBM Corp. 1991
4.2.1 - 1
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