Brand: Generic
Category: Notebook Computer
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for 486
Uploaded: April 20, 2026, 8:04 p.m.
The system board is based on the 486 series microprocessor and features single-chip upgrade technology. It supports an ISA riser card slot and two 72-pin SIMM sockets for memory expansion up to 36 MB. The system includes an onboard VGA with expandable memory and supports various LAN cards. Security features like power-on password and disk control are included. This chapter details the installation of memory modules, expansion boards, and CPU upgrades. It also covers jumper settings, CPU and cache selection, and power management features. Troubleshooting for system error messages is also provided.
Troubleshooting and error codes
| Error Message | Corrective Action |
|---|---|
| Bad CMOS Battery | Replace battery. Contact your dealer. |
| CMOS Checksum Error | Run Setup. |
| Diskette Drive Controller Error | Check and connect the cable to the diskette drive or controller. |
| Diskette Drive Error | Diskette may be bad. If not, check the diskette drive and replace if necessary. |
| DRAM Configuration Error | Check and modify DRAM configuration to agree with Table 1-5. |
| Equipment Configuration Error | Run Setup. |
| Fixed Disk Controller Error | Check and connect the cable to the fixed disk drive or controller. |
| Fixed Disk 0 Error | Check all cable connections. Check the fixed disk and replace if necessary. |
| Fixed Disk 1 Error | Check all cable connections. Check the fixed disk and replace if necessary. |
| Fixed Disk 0 Extended Type Error | Run Setup. |
| Fixed Disk 1 Extended Type Error | Run Setup. |
| I/O Parity Error | Contact your dealer. |
| Keyboard Error or No Keyboard Connected | Check and connect the keyboard to the system unit. |
| Keyboard Interface Error | Contact your dealer. |
| Keyboard Locked | Unlock the keyboard. |
| Memory Error | Check SIMMs on the system board. Contact your dealer. |
| Memory Size Mismatch | Run Setup. |
| Serial 1 Conflict | Run Setup. Disable onboard serial 1. |
| Serial 2 Conflict | Run Setup. Disable onboard serial 2. |
| Parallel Conflict | Run Setup. Disable onboard parallel port. |
| Pointing Device Error | Check and connect the pointing device. Contact your dealer. |
| Pointing Device Interface Error | Contact your dealer. |
| Press F1 key to continue or Ctrl-Alt-Esc for Setup | Press F1 or Ctrl-Alt-Esc. |
| Press F1 to Setup or other key to continue | Press F1 and reconfigure the system. |
| Press Esc to turn off NMI, any key to reboot | Press Esc to disregard NMI error. Press any key to reboot the system. |
| Protected Mode Test Fail | Contact your dealer. |
| RAM BIOS Error | Contact your dealer. |
| RAM Parity Error | Check SIMMs on system board or contact your dealer. |
| Real Time Clock Error | Run Setup. |
| Shadow RAM Fail | Contact your dealer. |
| System Memory Address Error | Check SIMMs on system board or contact your dealer. |