Power SC Service Guide
Page 81
... not set to OFF. 2. Refer to confirm ports presence before diagnosing any parallel/serial ports problems. Serial or parallel port loop-back test failed. 1. Keyboard Power Supply Pressing power switch does not turn off system. (Only unplugging the power cord from Recovery CD. Make sure that the LPT# or COM# you test is the same...
... not set to OFF. 2. Refer to confirm ports presence before diagnosing any parallel/serial ports problems. Serial or parallel port loop-back test failed. 1. Keyboard Power Supply Pressing power switch does not turn off system. (Only unplugging the power cord from Recovery CD. Make sure that the LPT# or COM# you test is the same...