# How to Downgrade BIOS

**URL:** <https://onehack.st/t/how-to-downgrade-bios/82387>\
**Category:** Discussion & Solutions\
**Tags:** solved\
**Created:** [April 26, 2020, 10:33am UTC](https://onehack.st/t/how-to-downgrade-bios/82387 "2020-04-26T10:33:31Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![Finicky](https://onehack.st/letter_avatar_proxy/v4/letter/f/839c29/32.png) [@Finicky](https://onehack.st/u/Finicky)\
**Post date:** [April 26, 2020, 10:33am UTC](https://onehack.st/t/how-to-downgrade-bios/82387/1 "2020-04-26T10:33:31Z")

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I have Acer predator helios 300 PH315-52. Somehow my BIOS got auto-updated and now my laptop is not running in battery. It runs normally when connecting it to the power supply. But as soon as i take out the charger the laptop switches off.

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**Author:** ![Paradox\_Shubham](https://onehack.st/user_avatar/onehack.st/paradox_shubham/32/32767_2.png) [@Paradox\_Shubham](https://onehack.st/u/Paradox_Shubham)\
**Post date:** [April 26, 2020, 3:46pm UTC](https://onehack.st/t/how-to-downgrade-bios/82387/2 "2020-04-26T15:46:59Z")

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Firstly, What is the firmware version of your BIOS installed ?  
U can check by entering into the BIOS or in the Acer Care Center app

In case you do not have the app 👇  
[https://www.acer.com/ac/en/IN/content/support-product/7983?b=1](https://www.acer.com/ac/en/IN/content/support-product/7983?b=1)

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**Author:** ![Finicky](https://onehack.st/letter_avatar_proxy/v4/letter/f/839c29/32.png) [@Finicky](https://onehack.st/u/Finicky)\
**Post date:** [April 28, 2020, 7:20am UTC](https://onehack.st/t/how-to-downgrade-bios/82387/4 "2020-04-28T07:20:14Z")

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the BIOS version is 1.10

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**Author:** ![Tony\_Stark](https://onehack.st/user_avatar/onehack.st/tony_stark/32/23611_2.png) [@Tony\_Stark](https://onehack.st/u/Tony_Stark)\
**Post date:** [April 26, 2020, 5:18pm UTC](https://onehack.st/t/how-to-downgrade-bios/82387/3 "2020-04-26T17:18:41Z")

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Look like this is not problem with **BIOS**. Problem in Battery, Remove and Re-Insert the battery or change the battery or check the battery with multi meter..

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**Author:** ![Finicky](https://onehack.st/letter_avatar_proxy/v4/letter/f/839c29/32.png) [@Finicky](https://onehack.st/u/Finicky)\
**Post date:** [April 28, 2020, 7:20am UTC](https://onehack.st/t/how-to-downgrade-bios/82387/5 "2020-04-28T07:20:45Z")

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Already did nothing happened

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**Author:** ![Tony\_Stark](https://onehack.st/user_avatar/onehack.st/tony_stark/32/23611_2.png) [@Tony\_Stark](https://onehack.st/u/Tony_Stark)\
**Post date:** [April 28, 2020, 3:25pm UTC](https://onehack.st/t/how-to-downgrade-bios/82387/6 "2020-04-28T15:25:34Z")

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ok! your laptop working with ac (without battery) right.. open device manager and check the 2 drivers are enabled or not? [Screenshot\_13|680x500](https://onehack.st/uploads/short-url/irww7346IjhhcGPfzpi3St9qVfQ.png)

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<div class="post-metadata">

**Author:** ![Finicky](https://onehack.st/letter_avatar_proxy/v4/letter/f/839c29/32.png) [@Finicky](https://onehack.st/u/Finicky)\
**Post date:** [April 29, 2020, 12:13pm UTC](https://onehack.st/t/how-to-downgrade-bios/82387/7 "2020-04-29T12:13:26Z")

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It’s enabled. It doesn’t even start without AC

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<div class="post-metadata">

**Author:** ![Tony\_Stark](https://onehack.st/user_avatar/onehack.st/tony_stark/32/23611_2.png) [@Tony\_Stark](https://onehack.st/u/Tony_Stark)\
**Post date:** [April 29, 2020, 3:48pm UTC](https://onehack.st/t/how-to-downgrade-bios/82387/8 "2020-04-29T15:48:00Z")

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Disassemble your laptop..

- Remove Battery Connection
- Remove HDD, Battery, Keyboard, DVD
- Remove RAM.
- Remove CPU Fan.. (Don’t Remove Processor)..  
after dissassemble

you will find Ic (chips)..

Cover the chips with double side tape like the image

![](https://us.v-cdn.net/6029997/uploads/editor/gn/9o10dir7jr4y.jpg)

and re assemble your laptop..

**Warning:** Try at Your on Risk… If you have warranty go **acer** support and fix it..

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<div class="post-metadata">

**Author:** ![Finicky](https://onehack.st/letter_avatar_proxy/v4/letter/f/839c29/32.png) [@Finicky](https://onehack.st/u/Finicky)\
**Post date:** [May 2, 2020, 7:47am UTC](https://onehack.st/t/how-to-downgrade-bios/82387/9 "2020-05-02T07:47:41Z")

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Thnq i guess i’ll wait for the lockdown to be uplifted