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.