![]() I think of it as a glorified watch battery. The reason you still need a battery is very simple: no matter what happens to the computer, be it unplugged or turned off, the clock needs to keep running in order to keep track of the current time. In the past, back when the battery was actually powering “CMOS RAM” to retain those settings removing the CMOS battery would cause your BIOS to lose not only the date and time, but also any customizations you might have made to the BIOS configuration. Most of those settings are kept in a type of dedicated flash memory, not unlike the kind that might be inside a USB flash drive. Typically the CMOS battery no longer affects whether or not BIOS settings are remembered. If the battery dies or is removed, then when your computer boots it will have forgotten the current date and time. I think of it as a glorified watch battery. The purpose of the CMOS battery most often today is simply to allow your computer to remember what time it is. While no longer the case, the term “CMOS” or CMOS battery lives on anyway. “CMOS” stands for “Complementary metal-oxide-semiconductor”, the original technology that was originally used in some of the circuitry that the battery was used to power. The good news is that, as you’ve seen, they typically last for years. It serves an important function, even though it’s actually possible on most machines to run without POST done, prepare to boot operating system.ĭo OEM (original equipment manufacturer) initialization.Actually all PCs, desktop and laptop alike, have a battery like this, typically referred to as the “CMOS” battery. Initialize local bus hard disk controller. Initialize manager for PCI (Peripheral Component Interconnect) options ROMs.ĭetect and install external parallel ports. Load alternate registers with CMOS (complementary metal-oxide semiconductor) values. Load alternate registers with initial POST values.Ĩ237 DMA (direct memory access) controller initialization. Initialize chipset registers with initial POST values. Reseat RAM chips or replace RAM chips as possible solution. Problem with SIMM (single inline memory module).īelow are the beep codes for Phoenix BIOS Q3.07 or 4.x. Problem with logic board or SCSI (small computer system interface) bus. Video (Mono/CGA display circuitry) issue.Įrror tone. ![]() POST error, review screen for error code. However, because of the wide variety of models shipping with this BIOS, the beep codes may vary. IBM BIOS beep codesīelow are general IBM BIOS beep codes. Dell beep codes Beep Codeįor other Dell beep codes, please refer to Dell's beep codes and PSA diagnostics chart page. If any other correctable hardware issues are found, the BIOS displays a message. Issue with the processor (CPU), possibly damaged. Repeated beeps alternating high & low frequency. Repeated high frequency beeps while PC is running. Video card not detected (reseat video card) or bad video card. Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary. Low CPU (central processing unit) fan speed, voltage level issue.īelow are the Award BIOS beep codes. Beep CodeĭRAM (dynamic random access memory) refresh failure. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes for your computer may differ slightly from those listed below.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |