Importance of upgrading BIOS in Windows® 7
What are the different issues that arise while upgrading BIOS?
BIOS stands for for basic input/output system. It is a built-in software that determines what a computer can do without accessing programs from a disk. In PCs, the BIOS contains all the codes that are enough to control the keyboard, display screen, disk drives, serial communications, and a number of miscellaneous functions. It is typically placed in a ROM chip that comes with the computer. Therefore, BIOS would always be available and would not be damaged by disk failures. It helps the computer to boot itself. As RAM is faster than ROM, many computer manufacturers design systems in such a way so that the BIOS is copied from ROM to RAM each time the computer is booted. This is known as shadowing. In order to upgrade BIOS, the system requires two files; the first is the upgraded BIOS in binary form and second is the 'flasher' program provided by the BIOS manufacturer.
Following are different issues that might arise while upgrading BIOS in Windows7:
- PC does not boot
- Error messages
- System boots with error message
PC does not boot
Check whether you have inserted the CMOS properly if you have removed it from the system. Confirm that the orientation of the IC is correct and all pins are properly inserted. If the user has flashed the BIOS with the wrong BIOS update, then the only option left is to replace the CMOS chip. Sometimes, the user accidentally resets or powers down the system during BIOS flash. This causes the BIOS to be partially programmed. In such a case, the BIOS becomes corrupt. You could remove the IC and reprogram it in a EEPROM programmer if possible.
After completing the upgrade process successfully, the system begins to pop up error messages. There are several reasons for this. It can be caused by a bad flash. In such case, reflash the BIOS with the backup of the BIOS which was made during the flash. After restoring the BIOS backup, you may reflash the BIOS again with the new update. Another reason for the error message might be the new settings within the BIOS. Memory timings are also a big issue.
After upgrading the BIOS, you may find that your system starts to boot with an error meassge saying “BIOS Boot Block Loaded”. This happens because the BIOS is not read correctly by the system because the BIOS is not cleared properly. So, power down and clear the BIOS. Make sure that you pull the system power cord while clearing the BIOS to ensure proper removal. If the problem persists, insert a bootable floppy and reflash the BIOS with the backup that you created during flashing. After restoring the BIOS, proceed with flashing the BIOS again. After flashing the BIOS, ensure that you clear it before proceeding.
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