Compaq 1610 Reference Manual page 89

While your handheld PC is configured just for you, problems you
encounter while working may not be unique. Eliminating the typical
problems described in this section can save you time and money.
See the categories on the following pages to find the possible solution
to your problem. If you cannot resolve the problem, contact your
Compaq authorized service provider or call Compaq Customer Support
for help. (See Appendix A, "Worldwide Telephone Numbers," for a
complete list of customer support numbers to call.)