Repair range

BIOS and CMOS classic fault

CMOS in English "complementary metal-oxide semiconductor" acronym, however we often say CMOS refers to a read-write memory chip on the motherboard, also known as the "CMOS RAM". CMOS RAM is random access memory, has the characteristics of elimination of memory after a power failure, people thought of using an external battery to maintain its method of storing content.
in General, by curing in the ROM BIOS software called BIOS settings BIOS parameter adjustment process, and through the BIOS settings in the "standard CMOS setting" debug parameters of CMOS process known as CMOS settings. We usually referred to the CMOS settings and the BIOS settings is simplified, so to some extent, the cause of two concepts confused.
/> How to enter the BIOS Setup program analysis: while designing the world manufacturer of BIOS is not much, but some brand and compatible design varies, so enter the BIOS setup methods vary.
answer: most of the keys are already set up to enter BIOS Setup "DEL" or "ESC", but there are also some BIOS F10 or F2, which special BIOS needed according to the prompts.
machine is not running an operating system issue
1.Bios Rom checksum error-System halted
analysis: errors found during checking BIOS information, will not turn on.
FAQ: this is tricky, because it is usually due to refresh the BIOS error, there may be the BIOS chip is damaged, however, BIOS needs to be repaired.
2.CMOS battery failed
analysis: no CMOS battery.
Troubleshooting: in general are CMOS without electricity, replacing the lithium battery on the motherboard.
3.CMOS checksum error-Defaults loaded
analysis: error on CMOS information check, so back to default state appearances.
FAQ: this is more likely to occur, but most are caused by power supply, such as overclocking failure can also happen CMOS discharge, should save the CMOS settings to test immediately; if this problem occurs again, replace lithium-ion batteries. In the case of replacement batteries still useless, and requests the Board to be repaired because CMOS chips can be damaged.
4.Press F1 to Continue,Del to Setup
: press the F1 key to continue, or DEL key to enter the BIOS Setup program. Usually this happens the possibility very much, but most are telling users: BIOS settings problem.
answer: because the source of the problem is not identified, likely a BIOS setting errors, can also be detected CPU fan is not installed, the user can according to the instructions in the paragraph above the actual operation.
: hard drive installation fails.
FAQ: detect any disk-related hardware, including power cables, data cables, and so on, also includes a hard drive jumper settings. If this is a new purchase of large-capacity hard disk, but also to figure out whether the motherboard supports. If these are not the problem, it's probably hardware issue, IDE, or your hard disk is damaged, but such chances are rare.
6.Primary master hard disk fail
: Primary master IDE hard drive errors. The same situation also appeared in other IDE master slave disk is not introduced.
FAQ: detect any disk-related hardware, including power cables, data cables, and so on, also includes a hard drive jumper settings.
7.Floppy disk?s? Fail
analysis: floppy drive detection failed.
FAQ: check any hardware settings associated with the floppy, floppy cable, power cord, and so on, if these are not the problem, it may just abort.
8.Keyboard error or no keyboard present
analysis: keyboard error or looking for a new keyboard.
answer: check the keyboard connection is correct, Reseat the keyboard to determine if the keyboard is good or bad.
9.Memory test fail
analysis: memory test failed.
FAQ: since the memory is not compatible or malfunction caused by, so please start with partial power on one memory at a time testing to identify failing memory, reducing memory usage parameters work or repair.
Why upgrade BIOS? How to update BIOS?
analysis: determines the hardware of the system BIOS program support and coordination. With the emerging new hardware, BIOS could not advance on such a wide variety of hardware support, which depends on the updates to the BIOS chip program. In order to support newer hardware, BIOS BUG elimination ever, improving the compatibility between products, or to improve product performance, upgrading the BIOS is the most simple and effective way to save.
answering: most Board manufacturers will regularly update products of BIOS FIREWARM, addition BIOS production manufacturers also will provides dedicated of refresh program, in not loaded any hardware drive and memory resides of pure DOS mode Xia, run refresh program, entered manufacturers provides of BIOS FIREWARM file name, through tips followed by select whether refresh → whether save original BIOS → whether update latest of BIOS, last by F1 key again started, can done.
Tip: here we need the original BIOS name is simplified as far as possible, but do not change its extension; should save the original BIOS, for BIOS refresh fails when using whole BIOS refresh process can not be powered down.
can upgrade BIOS in Windows?
: the conventional BIOS Flash program must be run in pure DOS mode and runtime system cannot load memory-resident programs. Now that Windows 2000 and Windows XP support for MS-DOS was canceled, in this case, the traditional upgrade path will be very inconvenient.
answer: many motherboard manufacturers have developed specific refresh program, the entire operation under Windows, you can directly download updates, can also be updated online, (depending on network conditions are not ideal, long recommended for downloaded BIOS update file. ) After the update program will pop up a message box indicating that the upgrade succeeded, and restart the computer. BACK PAGE