![Custom laptop power management: external activity, power on button, graceful power off, hard power switch | blog Custom laptop power management: external activity, power on button, graceful power off, hard power switch | blog](https://user-images.githubusercontent.com/26856618/33644041-6889bf3e-d9f7-11e7-87ef-3f0bd3afc7cb.png)
Custom laptop power management: external activity, power on button, graceful power off, hard power switch | blog
![RPi 3b doesn't boot from sd card. Without sd card, both ethernet light up, even with sd card inserted too. ACT led wont light up. 3.3v rail works. : r/RASPBERRY_PI_PROJECTS RPi 3b doesn't boot from sd card. Without sd card, both ethernet light up, even with sd card inserted too. ACT led wont light up. 3.3v rail works. : r/RASPBERRY_PI_PROJECTS](https://i.redd.it/fvgosflk52f81.jpg)
RPi 3b doesn't boot from sd card. Without sd card, both ethernet light up, even with sd card inserted too. ACT led wont light up. 3.3v rail works. : r/RASPBERRY_PI_PROJECTS
![pi 3b+ - Pi 3 Model B+ has steady red PWR LED but no green ACT LED with 2018-03-13-raspbian-stretch.img - Raspberry Pi Stack Exchange pi 3b+ - Pi 3 Model B+ has steady red PWR LED but no green ACT LED with 2018-03-13-raspbian-stretch.img - Raspberry Pi Stack Exchange](https://i.stack.imgur.com/cuukk.jpg)
pi 3b+ - Pi 3 Model B+ has steady red PWR LED but no green ACT LED with 2018-03-13-raspbian-stretch.img - Raspberry Pi Stack Exchange
![raspbian - No activity LED after shorting GPIO pins 3 and 5 on Raspberry Pi 4 - Raspberry Pi Stack Exchange raspbian - No activity LED after shorting GPIO pins 3 and 5 on Raspberry Pi 4 - Raspberry Pi Stack Exchange](https://i.stack.imgur.com/skmZq.jpg)
raspbian - No activity LED after shorting GPIO pins 3 and 5 on Raspberry Pi 4 - Raspberry Pi Stack Exchange
![Bewinner Module D'extension Industriel IoT sans Fil pour RasPi, Raspberry Pi CM4 UPS Module D'extension Industriel, RPi GPIO Status LED Bornier Breakout Board Hat pour Raspberry Pi : Amazon.fr: Informatique Bewinner Module D'extension Industriel IoT sans Fil pour RasPi, Raspberry Pi CM4 UPS Module D'extension Industriel, RPi GPIO Status LED Bornier Breakout Board Hat pour Raspberry Pi : Amazon.fr: Informatique](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61BUXIlbL7L._AC_UF1000,1000_QL80_.jpg)
Bewinner Module D'extension Industriel IoT sans Fil pour RasPi, Raspberry Pi CM4 UPS Module D'extension Industriel, RPi GPIO Status LED Bornier Breakout Board Hat pour Raspberry Pi : Amazon.fr: Informatique
![Custom laptop power management: external activity, power on button, graceful power off, hard power switch | blog Custom laptop power management: external activity, power on button, graceful power off, hard power switch | blog](https://user-images.githubusercontent.com/26856618/33644021-4bbc27a2-d9f7-11e7-9b63-1e15b80b4280.png)