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511
June 25th, 2023 14:00
Inspiron 7459, black screen and no power
Inspiron 7459
Hello,
I bought a Dell Inspiron 7459 since 2016 and have used it for a year. Warranty expired April 2017. But after that, I did not turn it on for about 6 months. When I opened it, the screen was black, but it was starting up, and I connected it with an HDMI cable on an external screen, and I saw the device working normally, but a black screen. I did not care about it and I parked it because I was facing many problems with this device, including When opened for more than two hours, the device was very hot and restarted automatically. But now I tried to open it, but it does not work completely. I tried to press the power button for 60 seconds, and there is no benefit in all DELL solutions, all of them failed.
I need solutions, if you have them.
Thanks
RoHe
10 Elder
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45.2K Posts
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June 25th, 2023 18:00
You might want to start by replacing the motherboard battery, if nothing else than to rule out a dead 7-year-old battery. Looks like this model uses a battery with wire leads so you'll likely have to order it on line. Probably a CR2032 with wire leads, but confirm for yourself.
This model has two HDMI ports, HDMI-OUT and HDMI-IN, #17 and #18, here. Are you sure you connected the external monitor to HDMI-OUT, #17?
Have you tried pressing button #8 (same link, above) on right edge of screen which turns the internal display on/off and is used to select HDMI-IN, in case you accidentally turned the internal LCD off or selected an external HDMI source (game box, DVD player, etc) which should have been connected to #18? Same button might also be used to select output to an external display too.
RoHe
10 Elder
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45.2K Posts
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June 25th, 2023 18:00
And one more question...what color is the PC's power button and is it steady or blinking when PC isn't working? If blinking, count the blinks because that's a error code.
Essamk62
5 Posts
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June 26th, 2023 05:00
The Power button is steady and there is no any sounds come from the PC
it just looks like no electric on it
i bought original adapter from amazon yesterday to test it if it not work with the new adapter I need to change the battery right?
if yes where can i the battery and how can i change it and how much
Thank you for your help
RoHe
10 Elder
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45.2K Posts
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June 26th, 2023 10:00
Is the power button's LED on or off and what color? If PC has "no electric", the power button LED should be off (dark).
I gave you a link to the Service Manual about replacing the motherboard battery and a link to help find a battery with a wired connector in my first post. The site where you bought the adapter has them.
Essamk62
5 Posts
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July 2nd, 2023 16:00
I have changed the motherboard battery and same issue
the power LED is off dark
RoHe
10 Elder
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45.2K Posts
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July 2nd, 2023 17:00
Possibly a bad power adapter..?
Essamk62
5 Posts
0
July 4th, 2023 05:00
I bought a new adapter and same problem
monikatak
1 Rookie
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30 Posts
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July 4th, 2023 05:00
Try performing a hard reset by disconnecting the power adapter, removing the battery (if possible), holding the power button for 60 seconds, then reconnecting the power source and attempting to turn on the laptop again.
Essamk62
5 Posts
0
July 4th, 2023 05:00
I tried to remove battery and click on power for 60 seconds and same problem i contacted dell to send me Numbers of approved maintenance services in my country and they sent me 3 numbers , first one says I am a restaurant for Kebab (: and second one number is wrong and the last one says We can't maintain it because we don't have spare parts