Technical Support Lenovo Y540-15IRH NM-C371 Keyboard not working & low wattage charger message

[bajram689]

Hello there,

i have a problem with a Lenovo laptop.

I tried different bios 16mb and 128kb but problem is still there.

I tried with other 128kb files but then the keyboard is not working completely. Then i flashed the original file & at boot and in bios settings the keyboard is working and also backlight is working.

As soon as im booting to SSD (Windows) the message "The connected AC adapter has a lower wattage than the recommended AC adapter" "press ESC to continue"

Battery is not charging. Also the keyboard is not working after pressing "ESC".

I checked everything 100 times on the mainboard, everything is ok. Before i flashed 128kb (verison BHCN27WW) file first time it was charging the laptop at least normal.

What is the fix?

Please check photos.

 

[bajram689]

Ok i fixed it by myself. Thank you...

 

[Ahmad Safari]

Hello
What was the problem?

 

[bajram689]

Hello
What was the problem?

Hi, sorry for late response.

Power message at the start means charger, had 7 different chargers tried out, the 8th did it LOL.

Keyboard issue is because the Super IO chip is bad. Also it depends on the firmware bios!!!! This is because when you update the bios to actual version the super io fries and there may be a unknown USB device in device manager poping up.

First I tough i fixed it, but then i realized after a reboot or shutdown the keyboard again is not working.

You have to take out the charger and do a 30 seconds power reset to make the keyboard work again.

So im pretty sure it is the super io chip. After all i diagnosed it and came to the conclusion to use this thing as a donor because i invested more than 9 hours in just this one device. So im not going to put more time in it.

In case someone has the same problem... ---->>>>> DONT TRY TO FIX IT, THIS IS JUST GOING TO WASTE YOUR TIME!

Thanks for eveyone who tried to help.