Why does my keyboard flash between caps, num lock, and scroll lock? It's also not letting me type. How do I fix this? - Quora
Solved: Need help interpreting CAPS LOCK blink codes on an HP 15 TS - HP Support Community - 5889106
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How To Fix The HP Error Code 0X80070057 - Meaning, Causes, & Solutions (Troubleshoot Quickly) - YouTube
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HP G61 laptop wont boot- display stays off, caps and num lock indicators blink repeatedly - Super User
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