2. Boot from the diagnostics diskette and start the PQA
program (refer to “Running PQA Diagnostics
Program” on page 25).
3. Select the Memory item to run the memory test.
If no error appears, install a new DIMM; if an error
appears, replace the system board.
System Programs in Flash Memory: System
setup programs are stored in flash memory.
Flash Memory Update: A flash memory update is
required for the following conditions:
New versions of system programs.
New features or options are added.
To update the flash memory, do the following:
1. Get the appropriate diskette containing the update.
2. Insert the System Program Service Diskette into drive
A: and power-on the computer.
3. Select Update system programs from the menu.
System Board Checkout
The processing functions are performed by the system
board. Processor problems can also be caused by the
system board.
1. Boot from the diagnostics diskette and start the PQA
program (please refer to “Running PQA Diagnostics
Program” on page 25).
2. Run the System Board test to verify the symptom.
This test verifies both the system board and the CPU.
If the tests detect a system board problem, replace the
system board.
Note: Do not touch the keyboard or pointing device when
the system board test is running. This may cause an
unexpected error.
Keyboard and External Input DeviceCheckout
Note: If an external keyboard is attached, remove it if the
internal keyboard is to be tested.
If the internal keyboard does not work or an unexpected
character appears, make sure that the flexible cable
extending from the keyboard is correctly seated in the
connector on the keyboard connection board on the
system board.
If the tests do not detect a keyboard problem, run the
Keyboard test by doing the following:
ThinkPad 310, 310D, 310E, 310ED (2600) 5