Kobo libra 2 VCOM

nftstra · Today, 10:32 AM

I replaced my broken libra 2 screen with a new one, but it have a different vcom value, does anyone know how i can change the VCOM of my libra 2, the ifixit method doesnt seem to work for the libra 2 ?

Thank you!

JSWolf · Today, 04:34 PM

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.

PeterT · Today, 05:38 PM

@JSWolf I believe this info came fro m the ifixit web site and applies to the Kobo Libra Colour, Clara Colour, and Clara BW (both N365 and P365) models.

https://www.ifixit.com/Guide/How+to+...Display/170983

Today, 10:32 AM	#1
nftstra Junior Member Posts: 1 Karma: 10 Join Date: Jun 2026 Device: libra 2	Kobo libra 2 VCOM I replaced my broken libra 2 screen with a new one, but it have a different vcom value, does anyone know how i can change the VCOM of my libra 2, the ifixit method doesnt seem to work for the libra 2 ? Thank you!

Today, 04:34 PM	#2
JSWolf Resident Curmudgeon Posts: 83,764 Karma: 153649587 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	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.

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Today, 05:38 PM	#3
PeterT Grand Sorcerer Posts: 13,997 Karma: 82524140 Join Date: Nov 2007 Location: Toronto Device: Libra H2O, Libra Colour	@JSWolf I believe this info came fro m the ifixit web site and applies to the Kobo Libra Colour, Clara Colour, and Clara BW (both N365 and P365) models. https://www.ifixit.com/Guide/How+to+...Display/170983

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