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Thisisalamp
Paper Tape
Posts: 3
Registered: ‎08-22-2016
Location: MY
Views: 265
Message 1 of 6

Peculiar Battery Mode Brightness issue - Lenovo Y40-80

Hello, first post here.

I am at lost with this somewhat few month old Lenovo Y40-80 laptop.

Everything is working fine, but whenever I unplug it from the charger, the screen goes black. Like totally black...if you needlessly stare at the black screen for a few seconds you can see very very faint background (which is the desktop itself)...and when plugged back in, the brightness comes back alive again.

Brightness controls are working well, drivers are updated. I even OneKey recovered my laptop to its initial state but to no avail. Still has the problem. The laptop is currently at factory state, still functional with that brightness being an issue on battery mode.

Sr Support Specialist
Posts: 7,811
Registered: ‎11-30-2015
Location: PH
Views: 244
Message 2 of 6

Re: Peculiar Battery Mode Brightness issue - Lenovo Y40-80

Hi Thisisalamp , 

 

Welcome to the Community Forums. 

 

Having the machine back on Factory setting ensures us that the issue may not be the software itself specially if you also have the power setting at High performance instead of Conservation mode. 

 

How is the current battery health and how long will a 100 % charge battery last ?

Would brightness be the same on an external monitor ?

 

Since battery is a consumable part that chemicals would deplete on usage , you can have the system on battery only to generate the battery report

 

Update us how it goes. 

 

Regards



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Thisisalamp
Paper Tape
Posts: 3
Registered: ‎08-22-2016
Location: MY
Views: 216
Message 3 of 6

Re: Peculiar Battery Mode Brightness issue - Lenovo Y40-80

Hi, thanks for your reply.

 

Yes, the intention of the factory reset was for me to judge whether it was a driver/software problem. Seemingly not.

 

I have attached the battery report as of last night in zip format; it is on smart charge (maintaining 55%-65% charge). I am unsure how long 100% battery last, but the battery is in good health according to Lenovo Energy Management. The laptop is only a few months old, so I expected that it'll be in good health. Is this issue related to the battery though I wonder?

Yes, the brightness is the same on an external monitor connected to HDMI. External monitor is ok. It seems as though the backlight is not working during battery mode.

Sr Support Specialist
Posts: 7,811
Registered: ‎11-30-2015
Location: PH
Views: 210
Message 4 of 6

Re: Peculiar Battery Mode Brightness issue - Lenovo Y40-80

Hi Thisisalamp , 

 

Greetings. 

 

Battery report shows fine. Checking on your current BIOS B5CN28WW(V1.07) 11/19/2014 (from the report ) and comparing it to current one from the support site I would rather suggest that you call in technical support first before any BIOS changes to have you best guided on next action plan .

 

From the BIOS advisory:

If BIOS version of the machine is higher than 29CN26WW (V2.03) (included), 29CN38WW (V2.15) or other latest ones can be directly updated to. If BIOS version of the machine is older than 29CN26WW (V2.03), please turn to local Lenovo service provider for BIOS update.

 

Update us how it goes. 

 

Regards



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Thisisalamp
Paper Tape
Posts: 3
Registered: ‎08-22-2016
Location: MY
Views: 204
Message 5 of 6

Re: Peculiar Battery Mode Brightness issue - Lenovo Y40-80

Hi Spidey101,

The links you have shown are for the G-series Laptops, I do not think that the BIOS will be compatible with my Y40-80.

I believe this is the correct link?

 

Sr Support Specialist
Posts: 7,811
Registered: ‎11-30-2015
Location: PH
Views: 198
Message 6 of 6

Re: Peculiar Battery Mode Brightness issue - Lenovo Y40-80

Hi Thisisalamp  , 

 

You have the right link for the BIOS ,mine was for another case . 

 

Follow the guidelines indicated making sure you have the latest as with video and energy manager drivers and apps and if you still have similar issue to call in for hardware service with tech support for checking integrity of LCD board and cable . 

 

Regards



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