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moabdellatif
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Posts: 3
Registered: ‎08-13-2018
Location: EG
Views: 1,598
Message 1 of 5

Lenovo Z50-70 restart loop with black screen

Hi, I have Lenovo Z50-70, everytime i try to power it up the powed led flash once and stop and the laptop starts again by itself and i hear the harddisk power up and stay on this state for 30 seconds and then power off and start again by itself, all this with black screen and no response with keyboard, and during the 30 seconds before it restart the DVD drive can open and close.

the way to stop this is to unplug the AC adaptor and the battary.

 

is there any solution regarding my issue.

Sr Support Specialist
Posts: 9,314
Registered: ‎11-30-2015
Location: PH
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Message 2 of 5

Re: Lenovo Z50-70 restart loop with black screen

Hi moabdellatif,

 

Welcome to the Community Forums.

 

I would suggest having the laptop checked in a service center specially if you already checked the ac charger working ok. They would be able to isolate on the board level which was causing this assuming that the RAMs are ok including the heat sink and fan assembly are fine.

 

Here is also the hardware manual if you have the tools and skills to clean and reapply thermal paste if needed.

 

Regards



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moabdellatif
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Message 3 of 5

Re: Lenovo Z50-70 restart loop with black screen

Thanks, but i removed RAMs and HDD and still the same status, and when i removed the AC while the laptop in the 30 seconds i hear a long beep

does it mean anything ?

Sr Support Specialist
Posts: 9,314
Registered: ‎11-30-2015
Location: PH
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Message 4 of 5

Re: Lenovo Z50-70 restart loop with black screen

Hi moabdellatif,

 

The beep may be because there are no ram. Try to re apply the thermal paste and clean the fan. If you are still having the same issue , best to have it checked with a board technician to isolate which part of the board is causing it.

 

Regards



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moabdellatif
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Posts: 3
Registered: ‎08-13-2018
Location: EG
Views: 1,521
Message 5 of 5

Re: Lenovo Z50-70 restart loop with black screen

Hi Spidy101,

Thanks for your support.

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