Acer Aspire X3950 Service Guide - Page 79

Video and Monitor-Related Symptoms Symptom / Error Serial or parallel port loop-back test failed. Printing failed. Printer problems. Action/FRU  Make sure that the LPT# or COM# you test is the same as the setting in BIOS Setup.  Loop-back.  Mainboard  Ensure the printer driver is properly installed. Refer to the printer service manual.  Printer.  Printer cable.  Mainboard.  Refer to the service manual for the printer. Keyboard-Related Symptoms Symptom / Error Check or do the following in sequence Some or all keys on keyboard do not work.  Keyboard Power Supply-Related Symptoms Symptom / Error Check or do the following in sequence Pressing power switch does not turn off system. (Only unplugging the power cord from electrical outlet can turn off the system.)  Ensure the Soft-off by PWR-BTTN. in BIOS Setup of Power Management is not set to Instant-off.  Power switch cable assembly Pressing power switch does not turn on the system  Ensure the power override switch (situated at the back of the machine, just above the connector for the power cable) is not set to OFF.  Power switch cable assembly. Executing software shutdown from  Load default settings. Windows98 Start menu does not turn off the  Reload software from Recovery CD. system. (Only pressing power switch can turn off the system). No system power, or power supply fan is not running.  Power Supply  Mainboard NOTE: If you cannot find a symptom or an error in this list and the problem remains, see "Undetermined Problems" on page 74. Chapter 4 71