crwdns2934241:0crwdne2934241:0 L is the name

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Why won't my laptop turn on?

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My laptop had disconnected with the display panel and I have found a way to reconnect it but it won't turn on. I can hear it running but the screen is still black

crwdns2866306:0crwdne2866306:0:

HP 15-b Series

crwdns2915684:0crwdne2915684:0:

open