HARDWARE FAULTS IN COMPUTER SYSTEM EXPpptx
- 1. HARDWARE FAULTS IN COMPUTER SYSTEM
- 2. Most common PC Hardware Problems 1.Your computer won’t turn on. 2.Your computer turns on, but still doesn’t work. 3.Your computer screen freezes. 4.Your computer has insufficient memory. 5.You get a CMOS error. 6.Your operating system is missing or your hard drive isn’t detected. 7.You get the blue screen of death.
- 3. Problem 1:- Your Computer Won’t Turn On Is everything plugged in? Is either the monitor, mouse, or keyboard the only thing not working? Check the power supply unit (PSU) may be turned off. Open up your tower and look at the motherboard. Check small LED light built in to show if power is running to the motherboard. If it’s turned off, you can either try to replace the PSU.
- 4. Problem 2: Your Computer Turns On, But Still Doesn’t Work If power is obviously flowing to the computer system and its peripherals, there may be a component issue. Many times the computer’s Power-On Self-Test (POST) will let you know what’s going on with the machine Beep Codes:- •No beep but the system turns on and runs fine - Under normal circumstances, most computer systems will beep one short beep when turned on. If yours doesn’t, your “beeper” may have died out. •No beep - The power supply is not plugged in or turned on. Or, the power supply is completely dead. •Steady, short beeps - The power supply may be bad or the voltages might be wrong. A replacement would usually be necessary.
- 5. •Steady, long beeps - The power supply has gone bad. •Long, continuous beep - Your Random Access Memory (RAM) sticks may have gone bad. Replace with other RAM. •One long, two short beeps - •There has been a video card failure. Your first action is to try reseating the video card. This often solves the problem when the computer system is connected to projectors because the VGA/DVI/Video cable gets moved so often that the card can be slowly unplugged. If reseating doesn’t work, replace the video card.
- 6. Problem 3: Your Computer Screen Freezes When your computer freezes and isn’t responsive to your mouse or keyboard, your computer takes time to process or end-task the non-responding program. • If that doesn’t work, turn off the computer by holding down the power button and then rebooting into Safe Mode (don’t forget about saving your work first, if you can) Problem 4: Your Computer Has Insufficient Memory Receiving an “insufficient memory or disk space” error message can usually be solved (at least temporarily) by closing extra windows to free up some RAM. If you really don’t have enough available memory and space, you can uninstall or delete any unused or unnecessary files, especially those of the video/music type. Your final solution is to add more RAM.
- 7. Problem 6: Your Operating System Is Missing or Your Hard Drive Isn’t Detected If the message “Missing Operating System” shows up on your screen, there are four possibilities the problem could be:- 1. The basic input/output system (BIOS) doesn’t detect Windows’ hard disk, or the disk failed. Take out the hard drive and reconnect it. If that doesn’t work, the hard drive’s interface is forbidden or the hard drive is seriously damaged. Go to BIOS and check In the BIOS that highlight the hard drive and set it to “Auto”. If it’s still invisible, you need a hard drive repair or replacement. 2. The BIOS settings are incorrect. Set the BIOS back to Default State. 3. The Master Boot Record (MBR) is damaged or corrupted. Rebuild the MBR using either the Windows installation disk, the Windows repair disk, or a bootable partitioning tool. 4. The Windows boot file partition isn’t active. Start the computer using a bootable partitioning tool. If that doesn’t work, set the wrong partition to ‘inactive’ and
- 8. Problem 7: The Blue Screen of Death The blue screen of death (BSOD) appears when Microsoft Windows has an unrecoverable, critical error that causes a crash and subsequent data loss. This can be caused by the low-level software in Windows crashing Some of the common solutions are to: •Make sure your computer isn’t overheating. If it is, close unused applications, check the fan is working properly, and conduct a good dusting after the computer is turned off before trying other solutions for an overheating PC. •Boot into Safe Mode before trying to fix a problem. •Test your hardware components and check the computer’s memory for errors. •Check for incorrectly installed or buggy drivers. Install updated drivers. •Scan for Malware that is causing the crash. •Reset or reinstall Windows. Use System Restore to get your computer back to its previous state. If it works, you probably have a software problem on your hands.