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Black screen after updating bios

HP Recommended
HP ProBook 4545s
Microsoft Windows 7 (64-bit)
Hello. I have a problem with my laptop. My model is HP ProoBook4545s. The laptop worked great and I tried to update the bios. The installation was completed and it was written that it was not successful. I continued to use the computer normally and later turned it off. So everything It worked perfectly as always until the computer was turned off. After 10 minutes when I tried to turn on the computer, the screen was black and the caps lock button flashed all the time. I tried everything I saw on YouTube all the tricks with the windows button and b button .I also tried the variant with the windows button and the v button. So none of that works. Can you tell me how to solve this problem, it's very urgent for me because of work. I'm sure the computer is not broken because after updating the bios failed I continued to use the computer for an hour totally normal and only after the restart I got this problem, which tells me that the problem is exclusively in the bios.
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