Exit all applications, and then shut down the system and all peripherals. Familiarize yourself with the case design and remove the case. Follow the equipment-specific FRU replacement steps necessary. Refer to Tables 1.8 and 1.9 for lists of common IRQ and DMA channel settings. Understand the advantages and disadvantages of manual configuration versus Plug and Play.
Manual configuration can be cumbersome, but it is necessary to fall back on.
Often the dynamic Plug and Play standard is not fully supported. Parallel communication is data being transferred over more than one separate path but that's travelling to the same location.