acer e15-551g posts and boots to bios but not os

noideawhatimdoin

Hi, I have a acer e15-551g  which has some kind of bios issue

the laptop post but doesn't boot to any operating system I've tried changing harddrives,ram,thermal paste and finally narrowed it down to the bios in the span of two years 😅,the bios always booted so I never suspected it was the bios until I flashed it which to my surprise worked and I was booted into ubuntu everything seemed fine so turned it off and then on however this time it was exactly like before the laptop posts,shows acer logo turns offf and on again and then just stays on with fans not spining,upon further inspection I found that the rechargable CMOS battery is dead soo could that be a reason the flash didn't work or should I flash the bios chip(winbond 25Q64FVSIQ) using a flasher(previously I flashed using a bootable usb drive with the bios file inside it which I got from the acer website and extracted using uefitools (the bios version was the same version which was in the laptop). I'm writing this to find help or if I'm lucky to figure it out hope it helps someone else

{Thread was edited to add model name to the title}

noideawhatimdoin

JackE said:

>>> I found that the rechargable CMOS is dead>>>

Not rechargeable. It's a primary Lithium button cell. Hard to tell how old this cell might be because it might've been sitting on a shelf for years before being installed. You can test this by tapping F2 on starrtup to enter the BIOS menu. Press  F9 to load BIOS defaults, the F10 to save defaults and exit. If it then loads ubuntu OK but doesn't the next time after being turned off for a day or two, then yes it's not keeping the BIOS memory of boot drive parameters.

 thank you for your response but I've solved the problem turns out I just needed to flash the bios again now it's working but CMOS button cell is definitely rechargable (it's says so the button cell itself) thankfully I found a seller with those sames cells and I'm waiting for cells so I can solder it on to the board.i know that bios corruption is rare at this level(I can get to the bios but not to any os).my honest guess is that it had something to do with the bootstrap loader becoming corrupt due to some very very unlikely 1 in a million kinda event (guess who's that lucky 😅). anyways this was helpful,and I hope this is helpful to someone else.cheers✨✨

StevenGen

noideawhatimdoin said:

Hi, I have a acer e15-551g which has some kind of bios issue

the laptop post but doesn't boot to any operating system I've tried changing harddrives,ram,thermal paste and finally narrowed it down to the bios in the span of two years 😅,the bios always booted so I never suspected it was the bios until I flashed it which to my surprise worked and I was booted into ubuntu everything seemed fine so turned it off and then on however this time it was exactly like before the laptop posts,shows acer logo turns offf and on again and then just stays on with fans not spining,upon further inspection I found that the rechargable CMOS battery is dead soo could that be a reason the flash didn't work or should I flash the bios chip(winbond 25Q64FVSIQ) using a flasher(previously I flashed using a bootable usb drive with the bios file inside it which I got from the acer website and extracted using uefitools (the bios version was the same version which was in the laptop). I'm writing this to find help or if I'm lucky to figure it out hope it helps someone else

The CMOS battery is also known as Real-time Clock (RTC). The estimated life of CMOS battery is about 3 years. It is used in computers to store BIOS information and settings. In case someone wants to reset all the BIOS settings even the password, then it has to be removed to achieve it.

If the CMOS battery is flat then the system does not the boot bios info to revert to. Change the CMOS battery as you will find that once you do that your Aspire E15-551G laptop should boot if your bios chip is not corrupted? 

JackE

>>> I found that the rechargable CMOS is dead>>>

Not rechargeable. It's a primary Lithium button cell. Hard to tell how old this cell might be because it might've been sitting on a shelf for years before being installed. You can test this by tapping F2 on starrtup to enter the BIOS menu. Press  F9 to load BIOS defaults, the F10 to save defaults and exit. If it then loads ubuntu OK but doesn't the next time after being turned off for a day or two, then yes it's not keeping the BIOS memory of boot drive parameters.

noideawhatimdoin

JackE said:

>>> I found that the rechargable CMOS is dead>>>

Not rechargeable. It's a primary Lithium button cell. Hard to tell how old this cell might be because it might've been sitting on a shelf for years before being installed. You can test this by tapping F2 on starrtup to enter the BIOS menu. Press  F9 to load BIOS defaults, the F10 to save defaults and exit. If it then loads ubuntu OK but doesn't the next time after being turned off for a day or two, then yes it's not keeping the BIOS memory of boot drive parameters.

 thank you for your response but I've solved the problem turns out I just needed to flash the bios again now it's working but CMOS button cell is definitely rechargable (it's says so the button cell itself) thankfully I found a seller with those sames cells and I'm waiting for cells so I can solder it on to the board.i know that bios corruption is rare at this level(I can get to the bios but not to any os).my honest guess is that it had something to do with the bootstrap loader becoming corrupt due to some very very unlikely 1 in a million kinda event (guess who's that lucky 😅). anyways this was helpful,and I hope this is helpful to someone else.cheers✨✨

JackE

Thanks for reporting back. Good luck.