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The Lenovo G50-70 can be identified by model information printed on the bottom (model name 20351), or on sticker next to track pad. This laptop has a 15.6 inch screen with Dolby audio. Manufacturing began in 2014.

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G50-70 takes as long as 24h to boot


The laptop won't boot until after as long as 24h. Boot time as gone lengthier and lengthier with time, to this extreme. From instant boot, to 5, 10, 20 minutes, to an hour to a day now. I seldom turn it off but I sometimes have to and I am afraid it is again going to get worse.

It's a pity because that machine is still kicking and wouldn't it be for that issue, I wouldn't think of getting a replacement.

Not sure if booting is the right word. It does not even get the manufacturer's splash screen. While it's waiting, white lines are flashing on the screen that you can barely see because the screen is not lit.

If you try to plug in the charger at that moment it makes a loud Beeeeeep ! I have tried to use the Lenovo PC Diagnostics app to listen to beep and get the error code but the app is either broken or only works for Thinkpads.

Someone on the internet suggested that it was a Power On Self Test (POST) issue, that is, IIUC, a hardware issue. But the SSD is new and the problem remains even with the battery off. Tried with different RAM sticks. Same.h

I thought this my be a problem with the CMOS battery but I measured its voltage with a voltmeter and I get a 3.2 volts measurement with seems normal (although I am not sure)

I found this where someone suggested a BIOS problem with a key or something I am not sure how to flash the BIOS:

I wish there was a more detailed walkthrough of what to buy and what to do... Also I am not sure that would fix the problem.

I am running Linux but I don't think that's the issue because the problem arises before linux even kicks in.

To conclude :

  • It gets worse with time
  • Not a HDD/SSD issue (brand new, no SMART errors)
  • Not a laptop battery issue
  • Not a RAM issue
  • CMOS seems fine but I am not sure
  • Maybe a BIOS issue ?
  • Any ideas ? Would really love to keep using that otherwise perfect machine
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Hi @cassepipe,

Boot issue and POST issue are two different things.

Disconnect the SSD from the motherboard and check if you get the splash screen or a message about no OS etc on the screen.

If you do then try to get into BIOS by starting the laptop and pressing the Novo button and then selecting BIOS setup.

If you get the above then POST is OK and there's a problem with the OS (or the SSD - doesn't have to be hardware it may be corrupted software). You can't get into BIOS if POST fails.

Try starting the PC a few times just to make sure that you can access BIOS every time quickly as it may be intermittent since you say it eventually boots into the OS

Is Linux the only OS installed or is it a dual boot?

Was it a clean Linux install i.e. having no Windows OS on the SSD or a brand new SSD etc?

If the above doesn't work then there's an intermittent POST problem (given that the laptop eventually boots OK), which is hardware related i.e. motherboard components or BIOS firmware.

POST checks that everything that is necessary to get the PC to be able to begin to boot into an OS e.g. CPU, ram, video controllers etc are working. If not usually there's a error code given by a blinking light/colour pattern with the various lights on the PC i.e. Power, Caps Lock and Num. Lock

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Ha very interesting !

I should have mentioned that I am able to get to the BIOS menu, it just takes a very long time to get there. I am under the impression that it takes even longer to get to it but I can access it. Any I I have wanted to do so to check all the parameters there, I have been able to.

Not a POST issue then.

Linux is the only OS on this machine. I got rid of dual boot some time ago now.

I have been able to make clean installs of Linux Mint various times on this machine. I did not notice any change the problem was very progressive.

I first spent a two years with dual boot (but windows 8.1 was almost unusable because it of a bug that make the HDD spin at 99%)

Then I clean installed Linux Mint on its own at least twice.

At no time did I notice a drastic change in the booting behaviour. This was very progressive. When it started bothering me I upgraded the old HDD to a brand new SSD thinking it was the culprit (I wanted to benefit from the SSD speed anyways).

Again, no remarkable change in the time I had to wait. Then I suspected the battery and got another because the old one was dead but I had already tried booting with the battery off so I was not expecting anything. Tried swapping Ram sticks too, to no avail.

- de


To me it is sort of a POST issue as normally this doesn't take long at all so something is tying it up.

Out of interest, what happens if you disconnect the SSD?

Does the fan turn on and stay on, does the screen turn on etc?

Since you've replaced the battery the following shouldn't make much difference but try a power refresh anyway. Disconnect the battery and then press and hold the power button for a full 30 seconds and then release it. reconnect the battery and the charger and check how long it takes to get into BIOS.

Try running the bootable diagnostics and check if they show anything.

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I will do a follow up as soon as I can.

I can only run the experiments on the evenings so that I can turn the machine on before going to bed and to know that it will have turned the day after.

Just a question about the "bootable diagnostics" lenovo software : Do I really need Windows machine to use it ? Can I use Wine ? It seems strange to me that I need windows only to make a bootable iso...

By the way, when I measured the CMOS battery voltage, the laptop was unplugged and the battery off but since it is soldered it was still attached to the motherboard, if that matters...

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Bootable diagnostics should mean that the program doesn't need Windows to operate.

It is a standalone program that should boot at startup from the bootable USB flashdrive .

Just make USB as the 1st boot option and not the HDD/SSD

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No I meant do I really need windows to *make* the bootable USB flash drive.

Anyways I was able to make one using someone else windows machine.

I have booted into it twice already (without SSD too) . It passes all the tests in all categories.

By the way the machine never failed to boot once provided I waited.

Someone on the internet suggested, it was probably a dead condensator that comes back to life with heat which could explain why it tends to take a long time, booting is blocked until it gets hot enough. Based on this I tried to boot my computer on a blanket so that it gets hotter faster, and it *only* took 3 hours. Will try again to see that confirmed. I am still in doubt though as the motherboard tests detected no issues. Well, maybe that when it's working it's really working but I wouldn't know really.

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