Common PC Errors and Troubleshooting Guide

This guide provides solutions for common PC errors.

1. Monitor LED Blinking

Problem: Intermittent display or no display.
Solution:
- Verify all cable connections: monitor cable, data cables, RAM, display card, and CPU connections.

2. Continuous Three Beeps

Problem: RAM connection issue.
Solution:
- Check and reseat the RAM modules.

3. Three Beeps (1 Long, 2 Short)

Problem: Display card connection issue.
Solution:
- Check and reseat the display card.

4. Three Long Beeps (Periodic)

Problem: BIOS or RAM issue.
Solution:
- Check RAM modules.
- If RAM is functioning, consider a BIOS reset or update.

5. Continuous Non-Stop Beeping

Problem: Keyboard issue (stuck key).
Solution:
- Check for stuck keys on the keyboard.
- Disconnect and reconnect the keyboard.

6. FDD LED Continuously Glowing

Problem: Floppy disk drive data cable issue.
Solution:
- Ensure the floppy disk drive data cable is properly connected (check for correct orientation).

7. No Display on Screen

Problem: Hard disk drive cable connection issue.
Solution:
- Verify the hard disk drive cable is correctly connected, ensuring the red stripe aligns with the power supply side.
- Restart the computer.

8. Power LED Off

Problem: Power supply or motherboard issue.
Solution:
- Check the main power cord.
- Check the SMPS (Switched-Mode Power Supply).
- Check the motherboard power connections.

9. CMOS Error

Problem: CMOS battery failure.
Solution:
- Replace the CMOS battery (3V).
- Manually set the correct CMOS settings (refer to the CMOS setup chart).

10. FDD Error or Floppy Drive Not Working

Problem: Floppy disk drive issues.
Solution:
- Check the floppy disk drive power cord and data cables.
- Verify CMOS settings.
- Test the floppy disk drive.

11. HDD Error or Hard Disk Failure

Problem: Hard disk drive issues.
Solution:
- Check the power cord and data cables.
- Verify hard disk parameters in CMOS or use auto-detection.
- If necessary, partition the drive using fdisk and format it.

12. Motherboard Hangs Due to Unstable Power Supply

Problem: Power or component issues.
Solution:
- Check the SMPS.
- Test RAM modules.
- Check for software conflicts (e.g., pirated software).
- Ensure the CPU fan is functioning correctly.

13. Dancing Screen

Problem: Display card or software issues.
Solution:
- Check the display card connection.
- Scan for viruses.
- Check the video memory.

14. Shaking Screen

Problem: Electrical interference.
Solution:
- Check for grounding issues.
- Identify and remove sources of magnetic interference.

15. CPU Cabinet Shock

Problem: Grounding or power issues.
Solution:
- Check grounding.
- Check the main power cord.

16. Non-System Disk Error

Problem: Boot sequence or hard disk issues.
Solution:
- Remove non-bootable disks from the floppy drive.
- Verify hard disk CMOS parameters.
- Check for hard disk partitions and formatting.

17. Missing Operating System

Problem: Missing system files.
Solution:
- Transfer system files using sys c: or format the drive with format c:/u/s.

18. Missing Command Interpreter

Problem: Corrupted or missing command.com.
Solution:
- Replace command.com.
- Scan for viruses.

19. I/O Error

Problem: Hard disk or operating system issues.
Solution:
- Verify hard disk type in CMOS.
- Ensure the formatting operating system is valid.

20. Divide Overflow Message

Problem: File or directory conflicts.
Solution:
- Use chkdsk /f or scandisk.

21. Hard Disk Noise During Processing

Problem: Power or hardware issues.
Solution:
- Check for a stable power supply.
- Check for loose connections.
- Avoid using Y-connectors for the hard disk.
- This can be a sign of bad sectors or a weak drive.

22. Hard Disk Hangs During Processing

Problem: Bad sectors.
Solution:
- Check for bad sectors using chkdsk or scandisk.
- Partition the drive to exclude bad sectors.
- Use a stable power supply.

23. Hard Disk Not Detected

Problem: Connection or jumper issues.
Solution:
- Check the power connector and data cables.
- Verify jumper settings.

24. Partition Not Shown

Problem: Operating system compatibility.
Solution:
- Ensure the operating system used for formatting is compatible with the motherboard.

25. MMX/DLL File Missing

Problem: Corrupted files.
Solution:
- Obtain the missing files from another computer.
- Reinstall Windows 98.

26. Windows Registry Error

Problem: System instability.
Solution:
- Reinstall the operating system.

27. Display Color Does Not Match

Problem: Display card configuration.
Solution:
- Configure the display card with the correct drivers.
- Set the resolution to 800x600 for optimal performance.

28. Unknown Device Found