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About the only reason it would do this is if the BIOS is damaged. Can you re-flash the BIOS from a CD or USB Key?
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About the only reason it would do this is if the BIOS is damaged. Can you re-flash the BIOS from a CD or USB Key?

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it is not showing bios page also
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If you strip down the system to most basic components and then re-seat those components like CPU and memory, you may come to know the issue. You just need the mobo, cpu, mem, display and keyboard, I suppose some interrupt requests are messing up.
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If you strip down the system to most basic components and then re-seat those components like CPU and memory, you may come to know the issue. You just need the mobo, cpu, mem, display and keyboard, I suppose some interrupt requests are messing up.

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here is what i do in such cases :<br />
<a href="https://www.experts-exchange.com/Hardware/Components/Motherboards/A_1945.html" rel="ugc">https://www.experts-exchange.com/Hardware/Components/Motherboards/A_1945.html</a>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (Short-overview-of-how-to-<wbr />troublesho<wbr />ot-bad-har<wbr />dware-when<wbr />-a-pc-does<wbr />-not-post)<wbr />
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here is what i do in such cases :
https://www.experts-exchange.com/Hardware/Components/Motherboards/A_1945.html [https://www.experts-exchange.com/Hardware/Components/Motherboards/A_1945.html]                  (Short-overview-of-how-to-troubleshoot-bad-hardware-when-a-pc-does-not-post)

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System needs a new motherboard.
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my pc is not working properly, it hang at bios. i removed all usb cable. i removed my hard disk, my bios page show. i go to bios setting, it hang again. plz tell me the problem,
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my pc is not working properly, it hang at bios. i removed all usb cable. i removed my hard disk, my bios page show. i go to bios setting, it hang again. plz tell me the problem,

pc hang at bios, starting windows

A desktop computer is a personal computer designed for use at a single location due to its size and power requirements, usually by one person. The most common configuration has a case that houses the power supply, motherboard, disk storage (usually one or more hard disk drives and optical disc drives); a keyboard and mouse for input; and computer monitor and printer for output. The case may be oriented horizontally and placed atop a desk or vertically and placed underneath or beside a desk.