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Old Yesterday, 08:33 AM   #5
nftstra
Junior Member
nftstra began at the beginning.
 
Posts: 4
Karma: 10
Join Date: Jun 2026
Device: libra 2
Quote:
Originally Posted by JSWolf View Post
This is from Google AI. It may or may not work. But it's not a problem if it doesn't work.

Step 1: Find the Target Screen Voltage

Every E-ink display is uniquely calibrated at the factory. The required voltage is written directly on the screen hardware.
  • Open the device to view the mainboard and the display panel ribbon cable.
  • Locate the printed sticker or a QR code on the E-ink display's flexible ribbon cable.
  • Note the 3-digit decimal number (e.g., -2.81 or -1.23).
  • Multiply this number by 1000 to get your VCOM value. For example, -2.81 becomes -2810.

Step 3: Calibrate the Value

If the recorded value doesn't match the hardware number from Step 1, apply the override:
  • Open the Kobo eReader.conf file via a computer text editor (Notepad++ on Windows)
  • Add your calculated value exactly as follows under the developer header:
Code:
ini

[DeveloperSettings]
VCOM=-2810
Save the file, eject your Kobo safely, and restart the device.
thank you

I tried this as well but it didnt solve the problem the device keep running on the original vcom which is in my case off by a lot so its hurting the screen, the last thing gpt suggest is to change the hex files on the sd card

so im going to look how i can carefully remove the sd card and clone it on a new one and see what happens
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