机型及用途:386教学用机。 故障现象:从硬盘启动机器后,按字母和数字键显示正常;按符号键,则实际显示与按键不符,其对应关系如下表。 处理过程:因从硬盘能启动机器,进入DOS后屏幕显示正常,且按字母和数字键部正确,所以开始并未怀疑硬盘的系统软件有问题,而以为是键盘或键盘接口部分出了故障。经查这两部分都正常。于是,开始怀疑硬盘软件出了问题。用 Model and use: 386 teaching machine. Symptom: After starting the machine from the hard disk, press the letter and number keys to display normal; press the symbol key, then the actual display does not match with the key, the corresponding relationship as follows. Process: Because the boot from the hard disk into the machine, after entering the DOS screen appears normal, and press the keys and numbers are correct, so the beginning did not suspect that the hard disk system software problems, and that is part of the keyboard or keyboard failure. The investigation of these two parts are normal. So, began to suspect that the hard disk software has a problem. use