I would like to update bios on my T61 but unfortunately battery died back in the stone age. The whole notebook is a Dual core T7100 1.8 Ghz Centrino Duo without Nvidia graphic card (it has intel integrated GMA) and with 2 gigs of ram. The laptop dates back to 2006 or 2007 if i remember well.
The problem is that whenever i want to update the bios using a bootable CD or pendrive I get a message like 'Error, battery not connected'. Basically the whole flashing process don't even begin due to the fact that battery is completely unusable.
What I've tried :
- Use Winflash by Phoenix after booting up the system, rename original fl1 files that come with lenovo t61 bios update online source to bios.rom and platform.bin. Program returns 'error 104 BIOS image checksum verification failed' for both official and un-official bios roms.
- Use Phlash16 dos program under initial boot-up command line to execute an updating process.
- Used /forceit command to somewhat bypass the battery status check as instructed in one forum board.
- Tried Middleton un-official bios for Lenovo T61 as well as official Lenovo T61 2.09 bios update.
- Disable whitelist check for various notebook components.
- Install apple macbook's wifi card inside the Lenovo T61.
- Install Mac OS.
I would like to ask how can I bypass this problem without the necessity of purchasing a brand new battery from store ?
Is it safe to perform flashing only with AC adapter cord plugged in and without the help of battery as an additional source of energy ?