There are the some Common Errors in PC and There Solution which can u solve as well as manually..
SEE ALSO:-
TOP-10 TIPS To Make Windows 7 Work Faster/Speed On Computer
1. MONITOR LED IS BLINKING
Check all the connections like Monitor Cable, Data cables,RAM, Display Card , CPU connections.
2. CONTINUOUS THREE BEEPS
Problem in RAM Connection.
3. THREE BEEPS ( 1 Long 2 Short)
Problem in Display Card Connection
4. THREE LONG BEEPS PERIOD WISE
Problem in BIOS or RAM (Basic Input Output System)
5. CONTINUOUS NON-STOP BEEPING
Key Board Problem (I.e.; Some Key is pressed for Longer time)
6. FDD LED IS GLOWING CONTINUOUSLY
Data cable to be connected properly (twisted cable).
7. NO DISPLAY ON THE SCREEN AT ALL
Hard Disk cable connected wrongly. Connect rightly seeing the Red mark (Faces power supply) and then Restart.
a. Check main power cord
b. Check S.M.P.S.
c. Check Mother Board connection
Replace 3 Volt battery of Mother Board . Set Original Settings Manually.(Refer CMOS Setup chart)
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Check Power cord of FDD , Data Cables , set CMOS & Finally the Check drive.
11. SHOWING HDD ERROR OR HARD DISK FAILURE
a. Check Power Cord
b. Check connection of HDD
c. Check Data cable
d. Check Hard Disk parameters in CMOS or Auto detecting Setting Partitions by Fdisk Command, then format it to set track 0.
a. Check S.M.P.S
b. RAM not functioning properly.
c. Software problem (due to using pirated software)
d. CPU fan not functioning properly.
13. DANCING SCREEN
a. Check Display card connection
b. Virus Problem
c. Video Memory Problem
14. SHAKING SCREEN
a. Earthing problem
b. Magnetic waves comes around.
15. CPU CABINET SHOCK
a. Check Earthing
b. Check main power cord.
16. NON-SYSTEM DISK ERROR
a. Floppy Drive having different disk (Non-Bootable Disk) OR CMOS Parameters for Hard Disk may not be set properly.
b. Hard Disk Partitions may not be created.
c. Hard Disk may not be formatted.
17. MISSING OPERATING SYSTEM
The System files missing namely Ie; command.com} - User File IO.SYS & MS_DOS.SYS } - Hidden Files. These above three files required for Start up of the system that can be transferred by using SYS C: Command OR While the time of formatting by using Format c:/u/s
18. MISSING COMMAND INTERPRETOR
May the file Command.com is corrupted OR Infected by Virus OR Some one has Erased it.
a. The type of Hard Disk in CMOS may not be set properly.
b. Operating system used for formatting is not valid
a. May some Directories or Files crash with other files.
b. Use CHKDSK/F or SCANDISK Command to correct it.
21. HARD DISK MAKING NOISE WHILE PROCESSING
a. Unstabilized power supply.
b. Check for Loose Contact.
c. Do not use Y Connectors for Hard Disk.
d. It may create Bad Sector OR Weak Hard Disk.
22. HARD DISK HANGS WHILE PROCESSING
Check for Bad Sector by using CHKDSK or SCANDISK Command. If found format the Hard Disk and set Partition before that area.(This is the only procedure to use Hard Disk with Bad Sector) OR (To avoid Bad Sectors use Standard Power Supply)
a. Check Power Connector
b. Check Data Cables
c. Check Jumpers
Operating System where the Hard Disk formatted is not supported with present Mother Board. For Eg: Hard Disk formatted with Pentium System will hide their partitions for 486 System.
May the above files may be corrupted due to power failure or Virus. Make available above files from other Computer. OR Reinstall Windows 98 Operating System. (This procedure will not make any effect on existing Data).
This will happen due to sudden ON/OFF of the system. Final solution is to Reinstall Operating System.
a. Configure Display Card properly with their CD.
b. The Standard setting for Windows is set it to 800x600 for better performance.
May the Driver utility is not provided with operating system . Insert Driver CD and install software for the above Device.
I HOPE YOUR PROBLEM WILL BE SOLVE AND SYSTEM WILL BE WORK PROPERLY !!!
ENJOY !!!!!!!!!
About Anoop 
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