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Helix-Wilcox
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October 31st, 2021 02:00
Power button blinks once
Dear all, I got a query today, my laptop is black screen and not turning on when I am connecting it to adapter and press power button, it turn on for about 2 seconds with black screen and turn off again then it turn on by itself again and turn off immediately after a voice of beep and blink and it’s repeatedly going on.
I removed RAM and checked and the same CMOS battery and HDD but none of them bring changes while removing or connecting.
I also pressed power button for 20 seconds and checked even without battery but its the same.
I need your help.
Model: Dell Latitude e7440
U2CAMEB4ME
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6245 Posts
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Posted October 31st, 2021 03:00
Welcome to the Dell Community @Helix-Wilcox
Hold down the "D" key, push the power button, release the power button, wait 2-3 seconds and release the "D" key
The laptop should go through an LCD test of solid White, Red, Green, Blue and Black 2 or 3 times.
After completion it should try to automatically boot 2 or 3 times.
Post your results,
U2
Helix-Wilcox
2 Posts
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Posted October 31st, 2021 21:00
Hey U2,
I did it and it went to solid screen several times but when it was trying to boot I heard a beep sound and turned off and at the same timed it turned off ac adapter and I need to unplug it from socket and plug back.
Thanks for your response
Helix
Parth Koli
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Posted July 2nd, 2024 03:38
@U2CAMEB4ME brother it did the LCD test 2-3 times but it just turned off immediately after completing it
DELL-Cares
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Posted October 31st, 2021 02:00
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