286 Express Card  (250-1035)    Troubleshooting        Faxback Doc. # 3172

What to Do if Your Computer Won't Boot

1.  If your computer fails to boot:

    1)  Remove power by unplugging the AC power cord, then remove all
        access covers.

    2)  Check to make sure the 8088 processor is oriented properly (not
        turned end-for-end) and that none of its pins are bent over.  Also
        check the daughterboard and the I/O cable to make sure they are
        all plugged in.

    3)  On the Tandy 1000SX, make sure the switches on the motherboard are
        set properly.

    4)  Double-check the 286 Express Card's option switches to make sure
        they are set properly and that the rocker or slide for each switch
        is fully engaged.  Especially check the math co-processor option
        switches (switches 1, 2, and 10) to make sure they are not all ON. 
        This setting is invalid and prevents the system from booting.

    5)  Replace covers and re-apply power.

2.  Your computer should now boot up.

    If you have double-checked your installation and the system will not
    boot up, contact your dealer of call PC Technologies' Technical
    Support department at 800/992-4616.

Software Timing Problems

Some software assumes that the computer's microprocessor is running at its
standard 4.77 MHz clock speed.  Since the 286 Express Card runs as 8 MHz,
time-dependent software might not run properly, and in some cases, not at
all, when the 286 Express Card is active.  However, the latest release of
most software has been modified to eliminate any dependence on the
microprocessor's clock speed and should run correctly.  For example, if
you are running Smartcomm II software, you need Version 2.1 or later.

(ALL-8/2/94)