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Paper Tape
Posts: 1
Registered: ‎03-24-2017
Location: GB
Views: 516
Message 1 of 3

U310 Ideapad Backlit but Not Booting

I have a U310 4375 i3 Ideapad which powers up but does not display POST or boot into Windows.

The screen is backlit but I don't get a Lenovo splash screen.

When I use the Novo button I get the boot option box but whichever option I select results in a black screen.

I suspect a bad bios but I can't get into the bios or boot menu so I can't flash it.

Is there a way to flash the bios without being able to see the bios or change the boot order?





Support Specialist
Posts: 2,948
Registered: ‎02-22-2017
Location: GB
Views: 462
Message 2 of 3

Re: U310 Ideapad Backlit but Not Booting

Hello Jhugh

Thanks for using the Lenovo forums.

Sounds like it could possibly be a faulty HDD as well, try a static discharge for this, it may help to resolve the issue or at least get rid of any built up static on the motherboard.

(If the battery is internal, please just skip the remove/replace battery steps.)
1. Turn the unit off
2. Remove the battery and the Mains adapter
3. Press and hold the front power button for 30 seconds
4. Replace the battery and the Mains adapter
5. Turn the unit on as normal

 If these steps do not work I would recommend, that you call your local Lenovo support line for a possible service. Below is the link to the phone list where you can find these numbers


Hope this helps, let us know how you get on.

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Pesszimistának lenni a legjobb, vagy igazad van, vagy kellemesen meglepődsz...
Retired Support Specialist
Posts: 3,772
Registered: ‎12-24-2015
Location: IN
Views: 443
Message 3 of 3

Re: U310 Ideapad Backlit but Not Booting

Power On Self Test (POST) is a measure of functionality of main devices indicated by a working BIOS screen, manufacturer splash logo screen, and caps /num lock able to turn on/off. 


So without the harddrive and battery, it should still complete P.O.S.T. with the main screen and even on external monitor (to differentiate a display issue) . Try shutting it down and remove the battery and hard drive , use one RAM at a time ( best if RAM can also be tested on another laptop). Press down the power button for 12 seconds to drain. Then using the Novo key (would work like a power button) to turn back on while connected to the ac adapter. 


Taking account of the status indicators (page 30), as a solid blue/white power indicator implies laptop being supplied. Keyboard flashed as the current verified the input device. 


The moment it would be checking the video chip (black display) and if same with external monitor suggest a no post issue with solid power LED. Display chipset is in question as it is soldered on the board. Reball / rework suggested by some is a unorthodox fix with specialized service center. 


Still try to clean out the fan and probably reapply thermal paste and check on GPU contacts to the board and improve ventilation as needed. 


Update us how it goes.







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