After tearing down and repairing the LG G3 I received someone’s broken Nexus 5, also known as LG D820. A part of the screen was shattered, but the digitizer still worked. It did, however, behave erratically. First I thought the digitizer was recording touches that weren’t there, but after disconnecting it, the problem persisted.
As it turned out, the power button was broken. Unlike the power button on my iPhone 4 – which didn’t respond at all – this button continuously registered presses when it was left alone. This makes the phone unusable because it will shut itself down, try to reboot, but before it can do anything thinks you’re trying to reset the thing.
The internet has dubbed this the “boot loop” and it’s a massive problem. Search for “lg boot loop” and you’ll get 4.3M results. “Nexus 5 boot loop” on YouTube yields 70K (!) videos. Probably not all of these boot loops are due to the power button; some reports suggest that some other connection on the main board degrades due to components heating up.
So what’s up with this particular instance? I fixed the phone by replacing the power button. When you can do this repair yourself, it will take about $1 and half an hour. I you go to a service company, they’ll probably charge $50+. As is so often the case, these tactile switches cost only a few cents but end up defining the (economic) lifetime of an expensive piece of hardware when they fail. I received 5 new buttons, so I decided to take one apart to try and understand what happened. Unfortunately, the original button was lost when I desoldered it.
As 2022 starts, let’s take some time to share our goals for CircuitPython in 2022. Just like past years (full summary 2019, 2020, and 2021), we’d like everyone in the CircuitPython community to contribute by posting their thoughts to some public place on the Internet. Here are a few ways to post: a video on YouTub, a post on the CircuitPython forum, a blog post on your site, a series of Tweets, a Gist on GitHub. We want to hear from you. When you post, please add #CircuitPython2022 and email firstname.lastname@example.org to let us know about your post so we can blog it up here.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — Pololu’s account of the chip shortage
Wearables — Monster-inspired costuming!
Electronics — How to make your own magnetic field probe!
Python for Microcontrollers — Python on Microcontrollers Newsletter: New Releases of MicroPython and CircuitPython and more! #Python #CircuitPython @micropython @ThePSF
Adafruit IoT Monthly — 2021 in Recap!
Microsoft MakeCode — MakeCode Thank You!
EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — JP’s Product Pick of the Week 1/18/22 KB2040 Kee Boar @adafruit @johnedgarpark #adafruit #newproductpick
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