IBM ThinkPad R40 2681 Hardware Maintenance Manual

Also see for ThinkPad R40: Special instructions User guide User manual Setup guide Hardware Maintenance Manual

Contents

Checkout guideUse the following procedures as a guide in identifying andcorrecting problems with the ThinkPad computer.Note: The diagnostic tests are intended to test only IBMproducts. The use of non-IBM products, prototypecards, or modified options can lead to falseindications of errors and invalid system responses.1. Identify the failing symptoms in as much detail aspossible.2. Verify the symptoms. Try to re-create the failure byrunning the diagnostic test or by repeating theoperation.Testing the computerThe ThinkPad computer has a test program calledPC-Doctor® DOS (hereafter called PC-Doctor.) You candetect errors by running the diagnostics test included inPC-Doctor. This section is an overview of the procedure.For details that depend on model-unique functions, refer to“Product overview” on page 45.For some possible configurations of the computer,PC-Doctor might not run correctly. To avoid this problem,you need to initialize the computer setup by use of the IBMBIOS Setup Utility before you run PC-Doctor. On the IBMBIOS Setup Utility screen, press F9, Enter, F10, and thenEnter.Note: When you initialize the computer configuration,some devices are disabled, such as the serial port.If you test one of these devices, you will need toenable it by using PS2.EXE.PC-Doctor cannot be used to test a device that is in thedocking station, even if the computer supports the dockingstation. To test a USB device, connect it to the USBconnector of the computer. To test the Ultrabay device,install it in the Ultrabay Plus slot of the computer.To run the test, do as follows:Note: In the following procedure, you can select an itemnot only with the arrow keys, but also with theTrackPoint. Instead of pressing Enter, click the leftbutton.1. Insert the PC-Doctor disk into the diskette drive; thenpower on the computer.If the computer cannot be powered on, go to “Powersystem checkout” on page 39, and check the powersources.Checkout guide36 ThinkPad R40