When computer no display at boot up, the first thing we should check is the BIOS. Motherboard BIOS is not only the place to store important hardware data, but also the very vulnerable part in motherboard. The BIOS is quite easy to be hurt, once damaged, system would probably be unable to work. Such failure is usually because the motherboard BIOS has been attacked by virus (of course, it could not rule out that motherboard itself has problems).
Commonly when the BIOS is hurt by virus, all data in hard disk would be lost, so we can examine whether the data in hard disk is complete to judge whether the BIOS is broken. If the data there stands intact, well then there are still three possibilities to cause computer no display.
One, iffy expansion slots or expansion cards like sound card inserting result in motherboard no response and then the computer no display.
Two, incorrect CPU frequency settings in CMOS (Complementary Metal Oxide Semiconductor) in the jumper-free motherboard is likely to cause no display issue. Naprawa komputerow We only need to clean CMOS to figure out this problem.
The jumper to clean CMOS is regularly near the lithium-ion battery on the system board, usually the first and the second seats are default short circuits, and jump the short circuits to the second and the third seats. If the older motherboard users could not find out the jumper, they can remove the battery, boot up the computer and enter CMOS, turn off the computer after adjusting CMOS settings, put the battery in – through this way CMOS also can be discharged.
Three, motherboard can not recognize memory, memory is damaged or memory mismatches the motherboard. Some older motherboards quite carp at memory, once the memory can not be recognized, the motherboard would have no way to boot up, and some even have no failure alarm. Certainly sometimes in order to enhance the performance of the system, people increase the memory, and they insert different model or different board’s memory which would also lead to the same problem.
When we troubleshoot the malfunction of computer on response on start, we should take heed of the aspects above.