# Fried 5V regulator?

**URL:** <https://forum.arduino.cc/t/fried-5v-regulator/1099060>\
**Category:** General Electronics\
**Created:** [March 7, 2023, 7:06pm UTC](https://forum.arduino.cc/t/fried-5v-regulator/1099060 "2023-03-07T19:06:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![rr\_gt](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/rr_gt/32/929553_2.png) [@rr\_gt](https://forum.arduino.cc/u/rr_gt)\
**Post date:** [March 7, 2023, 7:06pm UTC](https://forum.arduino.cc/t/fried-5v-regulator/1099060/1 "2023-03-07T19:06:29Z")

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I have a mega pro wich was working fine until i modified an oled display, will talk about it in a different topic.  
It was powered by a phone charger, 5V usb, and now it heats even without the display, arduino only, but it still works, until it overheats and shut off.  
What are the chances of only the regulator being faulty?

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**Author:** ![anon94801460](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@anon94801460](https://forum.arduino.cc/u/anon94801460)\
**Post date:** [March 7, 2023, 7:53pm UTC](https://forum.arduino.cc/t/fried-5v-regulator/1099060/2 "2023-03-07T19:53:27Z")

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What heats up?

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**Author:** ![mrburnette](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/mrburnette/32/702556_2.png) [@mrburnette](https://forum.arduino.cc/u/mrburnette)\
**Post date:** [March 7, 2023, 8:22pm UTC](https://forum.arduino.cc/t/fried-5v-regulator/1099060/3 "2023-03-07T20:22:05Z")

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> [@rr\_gt](#):
>
> but it still works, until it overheats and shut off.

Were you powering the barrel-jack from 5V? If so, the regulator could have been over-powered, but the fuse should have opened.

If 5V was applied to 5V board pin, the Q/A may require more dialog.

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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:** [September 3, 2023, 8:23pm UTC](https://forum.arduino.cc/t/fried-5v-regulator/1099060/4 "2023-09-03T20:23:01Z")

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