Epson Apex 386/33 Canadian Product User Manual - Page 117
System BIOS Error Message, FDC Error User Check
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5-3 System BIOS Error Message 8254 Error - Indicates a 8254 timer controller failure. 8237 Error - Indicates a 8237 DMA controller failure. 74612 Error - Indicates a 74612 page register failure. 8259 Error - Indicates a 8259 interrupt controller failure. 8742 Error - indicates a 8742 controller failure. Check Battery - Indicates a system backup battery disconnection or power loss. RTC Checksum Error - Indicates that the system memory refresh function does not work. Refresh Indicator Error - Indicates that the system memory refresh does not work. Base 64K Memory Error - Indicates that the system's first 64K memory does not work. FDC Error User Check - Indicates that the floppy diskette does not work. FDC Seek Failure - Indicates a failure of the floppy diskette "seek" operation. Keyboard Error User Check - Indicates the disconnection of the keyboard from the system or a keyboard device failure. Chapter 5: Troubleshooting 7