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Paper Tape
Posts: 3
Registered: ‎03-13-2017
Location: GR
Views: 598
Message 1 of 3

LENOVO G50-45 Strange Post Behavior And Bios Upgrade Problem

Pressing Power Button on my G50-45 causes laptop to try to post (Front Led is lit,you can hear HD spinning etc). After some seconds trying with nothing on screen (no post showing) laptop is reset and the same loop continues for ever.

If I left it do this loop, after some time, (I don't know how much time as I usually left it do this ovenight) laptop posts and goes to standby (I am always find it in standby mode Front Led blinkink.). If I press any button laptop wakes up and all things are working great Until Restart when same loop occures.

Trying upgrade bios from v1.07 to latest V38 (2.06) but as soon as insyde flasher starts flashing bios (erase/write) windows is restarted (without allowing flasher to finish I THING) causing the same loop to occure. After many restarts without proper post a message appear which states that the bios was not correct for that model. If I press any key to reset after many reset loops I concluded with window in stand by mode again.


Any Suggestions for a propper bios Update which I think is the problem ? ? ?


Support Specialist
Posts: 2,948
Registered: ‎02-22-2017
Location: GB
Views: 539
Message 2 of 3

Re: LENOVO G50-45 Strange Post Behavior And Bios Upgrade Problem

Hello LaSeR_net

Thanks for using the Lenovo forums.

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 that doesn`t work, then try a factory reset, this would rule out software related issues.

Note: Please back up all your data as running this reset will delete any data on your machine

1. Turn the machine off and press the recovery button which is located usually next to the power button. If you have a desktop machine you will need to power the machine back on and keep tapping the F2 key.
2. Use the arrow keys and press enter on system recovery. ( Desktop users can skip this)
3. Select “restore from the initial backup” and then “Next”.
4. Click “start” and accept the warning messages.
Length of time can vary depending on the speed of the machine.


 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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Paper Tape
Posts: 3
Registered: ‎03-13-2017
Location: GR
Views: 515
Message 3 of 3

Re: LENOVO G50-45 Strange Post Behavior And Bios Upgrade Problem

I made 2 new efforts to run a2cn45ww.exe to update bios.

Every time as soon as updater starts to erase/write, windows 8.1 restarts without asking anything and I think before updater finishes the update proccess. Any suggestions how to avoid restarting before finishing proccess ???



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