Solution:

Common problems and possible solutions are listed below: HARDWARE: A. Improper base address: 1. The base address you have selected is conflicting with the BIOS shadow RAM. Please disable the area for the board. 2. The base address you have selected for the board conflicts with that of other interface boards such as SCSI, LAN, or Sound boards. If so, adjust the address to forestall the conflict. 3. The base address you have selected for the board conflicts with expansion memory. If so, adjust the address to avoid the conflict. 4. You can use the F4 "Find Free Bank" function of DOS utility "SETUP" in the API-232 to help find the system's free bank. B. PCL-844H isn't properly plugged in the system: If that is the case, then re-install the board and make sure that it fits well in a 16-bit slot this time. Sometimes the slot for plugging board is bad. In this case, please try other slots until a good one is found. C. PCL-844H is out of order: Please check the board(s) ONE AT A TIME in the system and find out the detective one. It is also recommended to check it under DOS with F3 Diagnostics function of utility "SETUP" to verify the hardware conditions. D. Power consumption: Sometimes it happens when the total consumption of power in the system is higher than the power supply can provide. Especially when many interface boards including PCL-844H are plugged in the system. It is recommended to replace the current power supply with higher watt one. SOFTWARE: A. Conflict with EMM386, QEMM386: Under DOS/Win3.1 system, you may have selected a base address that conflicts with other driver such as EMM386 or QEMM386 memory management software. If so, reserve 16K bytes space for PCL-844 series, e.g. using "X=C800-CBFF" option in EMM386/QEMM386 command line of file CONFIG.SYS B. Incorrect address setting: The base address switch setting on board is not the same as the setting in configuration software.