# Printer shows ADC error when turning on the printer **URL:** \ **Category:** General Discussion\ **Created:** [March 18, 2023, 8:02pm UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336 "2023-03-18T20:02:52Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Raghav](https://avatars.discourse-cdn.com/v4/letter/r/54ee81/32.png) [@Raghav](https://klipper.discourse.group/u/Raghav)\ **Post date:** [March 18, 2023, 8:02pm UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/1 "2023-03-18T20:02:52Z")
### Basic Information: Printer Model: Ender 3 pro MCU / Printerboard: Atmega 1280p `klippy.log` [klippy (3).log](https://klipper.discourse.group/uploads/short-url/dg9evfiSUwMGam3tnz2vAvVADh6.log) (3.6 MB) Whenever i turn on my printer, it immediately shows the ADC error. Im not sure not i should do, i tried unplugging withthe temperature sensor and the extruder temperature wires to pinpoint the problem, but this didnt help ---
**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\ **Post date:** [March 19, 2023, 8:14am UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/2 "2023-03-19T08:14:58Z")
![image](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/a/af18b1031e82bc3ff3f7c8d572eb561afd5693ca.png) Klipper’s error is caused by your bed temperature Although I have no idea what could be causing a sudden jump from 0 to \>200°C for **BOTH** the bed and extruder temperature. From previous errors in your log the connection between the board and host seems unstable. Could be some severe defects in the hardware up to a dying board. ---
**Author:** ![Raghav](https://avatars.discourse-cdn.com/v4/letter/r/54ee81/32.png) [@Raghav](https://klipper.discourse.group/u/Raghav)\ **Post date:** [March 25, 2023, 9:26am UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/3 "2023-03-25T09:26:52Z")
So, i should first buy another mini usb cable, if that doesnt work i will need to replace my motherboard? Is there anyway to indivudially check if its the motherboards fault? ---
**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\ **Post date:** [March 25, 2023, 3:12pm UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/5 "2023-03-25T15:12:24Z")
See [How-To Trouble-Shoot](https://klipper.discourse.group/t/how-to-trouble-shoot/6326) Most likely some faulty hardware spoiling your fun. Can be anything from bad USB cable over a bad SD card up to a dead or dying board ---
**Author:** ![hcet14](https://avatars.discourse-cdn.com/v4/letter/h/ecd19e/32.png) [@hcet14](https://klipper.discourse.group/u/hcet14)\ **Post date:** [March 25, 2023, 6:49pm UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/6 "2023-03-25T18:49:14Z")
> [@Sineos](#): > > dead or dying board Hi Sineos, I read that in quite a few posts of you. My question is, what is a dying board? What are the indications for a dying board? Kind regards, hcet14 ---
**Author:** ![Raghav](https://avatars.discourse-cdn.com/v4/letter/r/54ee81/32.png) [@Raghav](https://klipper.discourse.group/u/Raghav)\ **Post date:** [March 25, 2023, 7:04pm UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/7 "2023-03-25T19:04:00Z")
ok so i dont think its the mainboard. I connected the head to another printer and its showing the temp is -96 now. ---
**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\ **Post date:** [March 26, 2023, 7:43am UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/8 "2023-03-26T07:43:05Z")
> [@hcet14](#): > > What are the indications for a dying board? The same as for any other dying hardware: Funky errors that are hard to diagnose. I have a board where the quality of the USB port is so piss poor that you need to bend the little metal things inside once in a while or it will loose connection. I have seen blown MOSFETs, burned heat-bed connectors, outright dead MCUs and you name it. Not really possible to provide a generic answer here ---
**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\ **Post date:** [March 26, 2023, 7:44am UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/9 "2023-03-26T07:44:54Z")
> [@Raghav](#): > > temp is -96 now. The thermistors are a good bet. Would be kind of funny if both bed and hotend thermistor are pining the fjords. ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [August 11, 2026, 3:06am UTC](https://klipper.discourse.group/t/printer-shows-adc-error-when-turning-on-the-printer/7336/10 "2026-08-11T03:06:01Z")