Static shock... uh oh.

[Hertz14]

Doing a clear on my alpha, and stupid me, I must have created a static charge some how and didn’t ground myself to the cab before touching the mpu casing. Everything works, except the sound. Ugh.


Anyone know where to start? I’m hoping the mpu isn’t damaged.

[rickhunter]

Plug headphones into the audio jack.  If you hear the sound, it is not the MPU.  Then you need to look into your amp to see if anything is burned on the amp, or where it plugs into.

[Hertz14]

Plugged it in to external and worked just fine. Reconnected to the mpu, and now sound works... it appears that the door harness had tugged on the Jack just enough to unseat it. So all good.


Definitely a reminder to me to:
1. Double check static charge before getting close to critical components, even tho that wasn’t the case this time. I normally am super careful around 044 IGT flash - didn’t think about it this time as not working on a board directly.
2. Keep it simple and double check connections.

[Stayouttadabunker]

Yeah....That happens to me a lot in the winter too.

I try to keep one hand on metal circuit board frames as much as possible to ground myself out.

[dailey]

It's worth the small investment to have a grounding wrist strap when working around static sensitive components. Keep in mind that damage can occur at thresholds below that which you can sense a shock.

Under the magnification of a scanning electron microscope (SEM), a static discharge occurring on a microchip can look like a bomb crater or a lightening strike. In less severe cases it can result in holes or cracks in conductive traces which can lead to shortened life.