Just save properly formed image to the BIOS Flash Update Utility direcory and reflash.
 
  1. and install Thinkpad BIOS Flash Update Utility (default location C:\DRIVERS\FLASH) Do not run update after instllation.  
  2. Check your instructions at C:\DRIVERS\FLASH<your bios version>\BIOS_LOGO.TXT
     
    Image preparation (for x230)  
  3. Create 640x320 image.  
  4. Open image in IrfanView  
  5. Stretch it to 640x480. Image -> Resize -> Uncheck “Preserve aspect ratio” -> Height: 480 -> Ok.  
  6. Press Image -> Decrease color depth -> Custom: 150  
  7. Make sure that checkboxes “Use best color quality” and “Use Floyd-Steinberg dithering” are checked.  
  8. Click OK.  
  9. Save as logo1.gif In my case “C:\DRIVERS\FLASH\gcuj25us\logo1.gif”  
  10. If file size is more then 30kb repeat steps 4-7 with lower colors value. (See BIOS_LOGO.TXT)  
  11. Run WINUPTP.EXE and follow the instructions.
     
    My image https://cdn.everypony.ru/storage/00/12/50/2017/01/24/adc8f85acc.gif

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Office Culture - These water cooler conversations sure get heated around here.
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Magnificent Metadata Maniac - #1 Assistant
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anatomy matters
@Background Pony #FB79  
Step 1: install GNU/HURD
Background Pony #4B5D
I wonder if there is a way to do this under Linux.
🐴
Office Culture - These water cooler conversations sure get heated around here.
Diamond Trophy - Are you a TAS by any chance?
Artist -
Magnificent Metadata Maniac - #1 Assistant
Solar Guardian - Refused to surrender in the face of the Lunar rebellion and showed utmost loyalty to the Solar Empire (April Fools 2023).
Non-Fungible Trixie -
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice

anatomy matters
@TheAbridgenator
Frieza did it. :p
 
I thought it was Socks and Cheney.
A BIOS isn’t cool at all; it’s only nerdy.  
So, making it 20% cooler won’t have any effect.
TheAbridgenator
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Entil'Zha
@Prof.NightJack  
Krillin: Shots fired!
Prof.NightJack
Equality - In our state, we do not stand out.
The End wasn't The End - Found a new home after the great exodus of 2012

Gizmonics Scientist
@TheAbridgenator  
Frieza did it. :p
TheAbridgenator
Perfect Pony Plot Provider - er of 10+ images with 350 upvotes or more (Questionable/Explicit)

Entil'Zha
Agreed! Let’s make it 20% cooler!
 
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