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haml3t
Paper Tape
Posts: 1
Registered: ‎12-28-2016
Location: DE
Views: 219
Message 1 of 2

G570 doesn´t start with battery. charging and ac works normal.

Hi all,

my G570 doesn´t start with battery and without AC power supply after bios upgrade 40cn33ww_64.

 

Charging works.

If i connect AC power supply and disconnect AC power supply, G570 works normal

with battery but sometimes it shows crossed battery symbol in windows 10.

In "sleep mode" i can start with battery - but after a day the "sleep mode" is off automatically.

 

I did a reset (30 seconds without battery and so on) but same problem.

I disconnect everything like keyboard, fan, dvd and so on, nothing helps.

 

Anyone the same problem or where can i download an old bios version like 40cn32 or older?

Retired Support Specialist
Posts: 915
Registered: ‎07-05-2016
Location: GB
Views: 179
Message 2 of 2

Re: G570 doesn´t start with battery. charging and ac works normal.


@haml3t wrote:

Hi all,

my G570 doesn´t start with battery and without AC power supply after bios upgrade 40cn33ww_64.

 

Charging works.

If i connect AC power supply and disconnect AC power supply, G570 works normal

with battery but sometimes it shows crossed battery symbol in windows 10.

In "sleep mode" i can start with battery - but after a day the "sleep mode" is off automatically.

 

I did a reset (30 seconds without battery and so on) but same problem.

I disconnect everything like keyboard, fan, dvd and so on, nothing helps.

 

Anyone the same problem or where can i download an old bios version like 40cn32 or older?


Hi haml3t and welcome to the community,

 

You might give this procedure a try. 

  1. Remove AC power.
  2. Remove main battery, and UltraBay battery if any.
  3. Remove CMOS backup (button cell) battery. The Hardware Maintenance Manual tells you how. You need to remove the palmrest to get to the battery. It's not hard, but if you're technophobic get somebody to help you.
  4. Touch a metal screwdriver blade or similar to both of the pins that the CMOS backup battery plugs into for 10s. The idea is to short them together temporarily.
  5. Replace CMOS backup battery and palm rest but NOT the other battery(ies) or AC yet.
  6. Press the silver power button and hold it for 10s. Release it for a couple of seconds, then repeat this step 2 more times.
  7. Re-install main battery(ies) and plug in the AC.
  8. Boot and cross fingers!
  9. Press F1 at boot to get to BIOS Setup and configure it the way you like (your settings were lost when you removed the CMOS backup battery.)
  10. After things are working properly (we hope!) update to the latest BIOS. Burn the DOS BIOS update CD and update it this way, do NOT update BIOS from within Windows.

Please report back if the above works for you. The above sequence does the most thorough reset of your machine, it's possible that not every step is necessary. If you're squeamish about opening your machine and don't have someone to help you, you could try skipping steps 3 - 5.

Hope this help you and let us know how you get on


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