My N110 got bricked I think. | Omega Community | Page 1

glad nacelle Apr 8, 2026, 6:38 PM

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Hello, Have you tried the recovery option for Upsilon ?

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Btw I'm french and most of the users on this server are French so if you prefer to use French, you can

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https://getupsilon.web.app/install

Upsilon

Upsilon is an open-source operating system for your Numworks calculator based on Omega.

open estuary Apr 8, 2026, 6:40 PM

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I have tried but it is not recognizing it

glad nacelle Apr 8, 2026, 6:41 PM

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Press 6 + reset and try again

open estuary Apr 8, 2026, 6:41 PM

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Nothing changed

glad nacelle Apr 8, 2026, 6:42 PM

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What OS are you using ?

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on your computer

open estuary Apr 8, 2026, 6:42 PM

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Windows

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11

glad nacelle Apr 8, 2026, 6:42 PM

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Is you calculator reconized by the device manager ?

open estuary Apr 8, 2026, 6:43 PM

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It was before but now it isn't.

glad nacelle Apr 8, 2026, 6:44 PM

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When you press 6 + reset are you sure that : you start pressing 6, start pressing reset, release reset, release 6 ?

open estuary Apr 8, 2026, 6:44 PM

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Maybe khicas from https://www-fourier.univ-grenoble-alpes.fr/~parisse/nws.html
(Khi+KhiCAS (20.0.03, 10/07/2025))
Installed a locked bootloader ?

glad nacelle Apr 8, 2026, 6:45 PM

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KhiCAS doesn't modify the bootloader as far as I know

open estuary Apr 8, 2026, 6:45 PM

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it installed epsilon.

glad nacelle Apr 8, 2026, 6:46 PM

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just now ?

open estuary Apr 8, 2026, 6:46 PM

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No. The khicas I installed was a custom epsilon build.

glad nacelle Apr 8, 2026, 6:46 PM

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So what's the current state of your calculator ?

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Which bootloader and which firmware ?

open estuary Apr 8, 2026, 6:48 PM

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Black screen, red led, doesn't get recognized by computer. Tried different cables. Previous bootloader was the one you get with upsilon. had a upsilon image. After install it looked like epsilon, bootloader was still there. I ran the slot A. I reset. Now current state.

glad nacelle Apr 8, 2026, 6:49 PM

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How did you installed Epsilon ?

open estuary Apr 8, 2026, 6:49 PM

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glad nacelle Apr 8, 2026, 6:50 PM

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That's not Epsilon 😅

open estuary Apr 8, 2026, 6:51 PM

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Oh no....

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It's an install for epsilon

glad nacelle Apr 8, 2026, 6:53 PM

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You said that you installed Epsilon. Did you used the slot flash mode of the bootloader with the Epsilon update ?

open estuary Apr 8, 2026, 6:53 PM

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I think I bricked it 😢

glad nacelle Apr 8, 2026, 6:53 PM

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open estuary I think I bricked it 😢

Nearly impossible

open estuary Apr 8, 2026, 6:53 PM

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glad nacelle You said that you installed Epsilon. Did you used the slot flash mode of the boo...

What ?

glad nacelle Apr 8, 2026, 6:54 PM

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How did you install Epsilon ?

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Is it using this ? https://my.numworks.com/devices/rescue#/

Log in

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Or the update page ?

open estuary Apr 8, 2026, 6:55 PM

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No

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Using this page is https://www-fourier.univ-grenoble-alpes.fr/~parisse/nws.html

glad nacelle Apr 8, 2026, 6:56 PM

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This is the installation page for KhiCAS, not Epsilon

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Epsilon is a firmware. KhiCAS is an app

quartz pewter Apr 8, 2026, 7:00 PM

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glad nacelle KhiCAS doesn't modify the bootloader as far as I know

There's a Khi bootloader forked from Omega's bootloader, but it shouldn't matter

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Are you currently using Windows or Linux ?

glad nacelle Apr 8, 2026, 7:00 PM

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Windows

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#1491507366456201256 message

open estuary Apr 8, 2026, 7:11 PM

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Running windows 11

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It was the upsilon's bootloader.

quartz pewter Apr 8, 2026, 7:12 PM

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So plug your calculator to your computer, then enter RESET + 6 mode (press RESET, press 6, release RESET, release 6, in this order (especially for the last 2 ones)). Windows should make a sound and the device manager list should refresh

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Do you manage to enter this mode ?

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The screen will probably stay black with a red LED, but the USB will be active

open estuary Apr 8, 2026, 7:15 PM

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no didn't xwork

glad nacelle Apr 8, 2026, 7:16 PM

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Have you tried another cable ?

open estuary Apr 8, 2026, 7:16 PM

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Yes

glad nacelle Apr 8, 2026, 7:18 PM

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Does the LED turn off for a short time when you press reset + 6 ?

open estuary Apr 8, 2026, 7:20 PM

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no

glad nacelle Apr 8, 2026, 7:21 PM

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the MCU could be soft-bricked 🤔

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Can you open the calculator, disconnect the battery and then reconnect it ?

open estuary Apr 8, 2026, 7:25 PM

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Should I remove the cable after disconnecting the battery ?

glad nacelle Apr 8, 2026, 7:25 PM

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before

open estuary Apr 8, 2026, 7:26 PM

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then ?

glad nacelle Apr 8, 2026, 7:26 PM

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reconnect the battery

open estuary Apr 8, 2026, 7:26 PM

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I did it it is still black and red led

glad nacelle Apr 8, 2026, 7:26 PM

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try the 6 + reset

open estuary Apr 8, 2026, 7:27 PM

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still red and black

glad nacelle Apr 8, 2026, 7:29 PM

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Is it detected by Windows ?

open estuary Apr 8, 2026, 7:31 PM

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No

glad nacelle Apr 8, 2026, 7:35 PM

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Do you have another computer to test ?

quartz pewter Apr 8, 2026, 7:36 PM

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What were you doing at the moment where it got into this state ?

open estuary Apr 8, 2026, 7:38 PM

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I was running upsilon then I installed khicas from https://www-fourier.univ-grenoble-alpes.fr/~parisse/nws.html
(Khi+KhiCAS (20.0.03, 10/07/2025)) After booting to slot A with the upsilon bootloader I had the epsilon interface with NWA apps. THen i pressed reset because I wanted to revert to upsilon and now the calculator doesn't connect to computer, shows black screen and red led.

quartz pewter Apr 8, 2026, 7:38 PM

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Did you open KhiCAS at some point ?

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If so, did you accept the prompt to update the bootloader ?

open estuary Apr 8, 2026, 7:40 PM

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No idea.

quartz pewter Apr 8, 2026, 7:41 PM

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Do you at least know whether you opened KhiCAS after installing it from the website ?

open estuary Apr 8, 2026, 7:41 PM

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I opened Khi

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It looked like epsilon and had KhiCAS installed

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I ran KhiCAS

quartz pewter Apr 8, 2026, 7:43 PM

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So my best guess is that you accepted KhiCAS's prompt for bootloader update, which doesn't work correctly if Upsilon's bootloader is installed: in this case, KhiCAS erases the bootloader, but can't install their own bootloader due to Upsilon's bootloader securities

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In this case, you are left with a calculator with a wiped bootloader, which won't boot unless using RESET + 6 mode (which switches to the the STM32 native bootloader)

open estuary Apr 8, 2026, 7:46 PM

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So what can I do to solve this .

quartz pewter Apr 8, 2026, 7:49 PM

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The most probable reason (and the best case) is that you are doing the RESET + 6 procedure wrong :

Press RESET (using a pen or a small screwdriver for example, the button should move by a bit more than one millimeter and make a small sound (not a click, but possible to hear) when you are at the maximum position of the button)
Press 6
While keeping 6 pressed, release RESET
Release 6

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Some tools or pens are too large for the reset button to work

glad nacelle Apr 8, 2026, 7:50 PM

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And the calculator must be fully closed

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make sure that the black rubber piece is in place

open estuary Apr 8, 2026, 7:53 PM

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I did it still remains black screen red led

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I did it exactly as you told me

glad nacelle Apr 8, 2026, 7:53 PM

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Yes but does Windows detect the calcualator now ?

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The black screen and red light is normal

open estuary Apr 8, 2026, 7:53 PM

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still doesn't

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Wait how do I check I have lib usb installed

glad nacelle Apr 8, 2026, 7:54 PM

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I don't know

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But I think that Windows should at least detect the calculator

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Which category of the device manager are you looking at ?

quartz pewter Apr 8, 2026, 7:55 PM

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Windows will make a sound and the list in the device manager will refresh if you plug the calculator (and it's quite visible as Windows is really slow), even without a driver

open estuary Apr 8, 2026, 7:57 PM

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I just got it !

quartz pewter Apr 8, 2026, 7:57 PM

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It should appear as STM32 BOOTLOADER, but depending on Windows's mood, it can also be anything with "ST" in the name, like "Guillemot STM DFU device"

quartz pewter Apr 8, 2026, 7:57 PM

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open estuary

That's it

glad nacelle Apr 8, 2026, 7:57 PM

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open estuary

YAY !

open estuary Apr 8, 2026, 7:57 PM

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YUAAAA !!!

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Tysm !!!

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Now how do I reinstall it's driver for upsilon ?

glad nacelle Apr 8, 2026, 7:58 PM

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driver ?

quartz pewter Apr 8, 2026, 7:58 PM

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Can you try to got to Upsilon's Website and press the "Recovery" button ? https://getupsilon.web.app/install

Upsilon

Upsilon is an open-source operating system for your Numworks calculator based on Omega.

glad nacelle Apr 8, 2026, 7:58 PM

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is the calcualtor detected by the recovery website for Upsilon ?

quartz pewter Apr 8, 2026, 7:58 PM

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If the driver works (usually it doesn't), it should list the STM32 BOOTLOADER in the device selector

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If it's not detected, you should reinstall the driver (a link to download it from NumWorks's website is available in #resources)

open estuary Apr 8, 2026, 7:59 PM

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Doesn't work

glad nacelle Apr 8, 2026, 8:00 PM

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quartz pewter If it's not detected, you should reinstall the driver (a link to download it fro...

Try this

quartz pewter Apr 8, 2026, 8:00 PM

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Can you try to reinstall the driver ? https://cdn.numworks.com/81cc6426/numworks-driver-win64.msi

open estuary Apr 8, 2026, 8:01 PM

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Then ?

glad nacelle Apr 8, 2026, 8:02 PM

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retry the rescue

open estuary Apr 8, 2026, 8:02 PM

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It worked :

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Thank you so much guys ! You guys are saviors lmao.

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Hold on. What do you run on your calculator

glad nacelle Apr 8, 2026, 8:03 PM

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open estuary Hold on. What do you run on your calculator

like apps ?

open estuary Apr 8, 2026, 8:04 PM

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Firmware and apps ?

quartz pewter Apr 8, 2026, 8:04 PM

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I have Upsilon with a wallpaper, a few apps (KhiCAS, Nofrendo with Pac-Man, Tetris and 2048, Breakout on CHIP-8)

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Some time ago I had Link's Awakening, and Python games

glad nacelle Apr 8, 2026, 8:05 PM

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I a vanilla Upsilon on my N0110 and Epsilon on my N0120

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But I only use then for programming

open estuary Apr 8, 2026, 8:05 PM

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U installed from https://upsilonnumworks.github.io/Upsilon-External/

glad nacelle Apr 8, 2026, 8:05 PM

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So sometime I have a version of Numcraft installed

quartz pewter Apr 8, 2026, 8:05 PM

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open estuary U installed from https://upsilonnumworks.github.io/Upsilon-External/

Yes

open estuary Apr 8, 2026, 8:06 PM

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I kinda wanna make my own version of KhiCas is it possible ?

quartz pewter Apr 8, 2026, 8:06 PM

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Yes, if you are willing to fight against the build system…

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Why would you want to do that ?

quartz pewter Apr 8, 2026, 8:07 PM

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open estuary U installed from https://upsilonnumworks.github.io/Upsilon-External/

https://www-fourier.univ-grenoble-alpes.fr/~parisse/nws.html is the website from the upstream developer (Parisse), but he does some things that aren't really compatible with Upsilon

open estuary Apr 8, 2026, 8:08 PM

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quartz pewter https://www-fourier.univ-grenoble-alpes.fr/~parisse/nws.html is the website from...

Yeah I got my upsilon bootloader erased thanks grenoblois 😄

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Anyways thanks a lot for the help guys 😄

glad nacelle Apr 8, 2026, 8:08 PM

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Happy to help

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!close

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hhmmm not close 🤔

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It's been a while

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!finish

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I need help guys, I don't remember the command 🤣

quartz pewter Apr 8, 2026, 8:12 PM

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!end

#My N110 got bricked I think.