Question No post fan spin for 30 seconds or so and restart

Sep 5, 2021
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I have a gigabyte motherboard that i updated bios using gigabyte app center bios menu but when i restarted it wont boot and there is no display signal fan spin for 30 sec or long then restart. i m stuck after trying many thing like pressing power button and restart button together and removing cmos battery it booted into bios i checked bootable disk ordered and save and exit and didnt load default after that it never showed bios or anything i tried agian those things and tried jumper but no result.
Pls help i dont want to buy a new mobo
Pls help
 
Sep 5, 2021
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well you could try to use the other parts on another mobo, you should see a technician if you dont have another pc that have the compatible mobo.
Thanks for reply
Yes i dont compatible mobo to check if ram is faulty but i have chekced psu is good
I have another system an old one sometime that too show black screen but when i reset cmos it will work also in that pc the fan keeps rotating , i dont understand why fan in this pc runs for 20 30 sec then stops and why is bios not resetting
 

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