# Arduino mega connection problem

**URL:** <https://forum.arduino.cc/t/arduino-mega-connection-problem/1199476>\
**Category:** General Electronics\
**Created:** [December 12, 2023, 4:25am UTC](https://forum.arduino.cc/t/arduino-mega-connection-problem/1199476 "2023-12-12T04:25:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jonaecc](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/jonaecc/32/222093_2.png) [@jonaecc](https://forum.arduino.cc/u/jonaecc)\
**Post date:** [December 12, 2023, 4:25am UTC](https://forum.arduino.cc/t/arduino-mega-connection-problem/1199476/1 "2023-12-12T04:25:16Z")

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hello everyone. I have a problem with my Arduino mega. I have basic knowledge of electronics, and I would need help identifying the fault. I describe the error: I have my Arduino mega connected to a ramps 1.6 on my 3d printer. I had to remove the diode that goes from the ramps to the VIN of the Arduino. And I feed it externally with a 12V voltage regulator. The 24V input of the ramps had a failure and the plastic of the + pin was slightly damaged. So now the PC does not recognize the Arduino mega. If I turn on the printer with everything connected, it turns on but the letters on the LCD disappear after a few seconds of being on. If I power the Arduino from the USB the fault is the same, but it does not occur unless I turn on the 24V power. Initially I tried replacing the 16mhz crystal And I did basic tests on capacitors and resistors, but they seem to be working correctly. I haven't tried the 5V regulator yet, but I don't think the problem is there, Since powering the Arduino at 12V the board continues to receive power and even the printer menu appears on the LCD. I repeat that the PC does not recognize the Arduino. If anyone could give me any ideas to try, I would be eternally grateful.

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**Author:** ![jonaecc](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/jonaecc/32/222093_2.png) [@jonaecc](https://forum.arduino.cc/u/jonaecc)\
**Post date:** [December 12, 2023, 3:53pm UTC](https://forum.arduino.cc/t/arduino-mega-connection-problem/1199476/2 "2023-12-12T15:53:00Z")

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Today I was able to do some more testing on the Arduino. Check all input and output pins, the VIN along with its 5V regulator is working normally. So I can assume that the fault is in the usb-to-serial chip or the usb-to-serial oscillator. What do you think?

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**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [June 9, 2024, 3:53pm UTC](https://forum.arduino.cc/t/arduino-mega-connection-problem/1199476/3 "2024-06-09T15:53:33Z")

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Closed on June 9, 2024, 3:53pm UTC

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