Back USB port on 722 (1 Viewer)

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BBCInc

Thread Starter
On the dry and dusty road
Feb 23, 2009
470
18
Colorado
After blow-out dusting my 722 (non K), the rear USB port no longer works with an EHD. Is a USB port that susceptable to dust particles?
 
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jtiner

Well-Known SatelliteGuys Member
Sep 26, 2010
30
0
Maine
Yes it does, that's why I'm confused.

It's possible for compressed air to generate a static charge and damage components, but I've never actually seen it happen. It seems more likely that something else happened when you disconnected/reconnected the cable. Perhaps there's a cold solder joint/mechanical issue where the socket joins the circuit board.
 

BBCInc

Thread Starter
On the dry and dusty road
Feb 23, 2009
470
18
Colorado
There has been other unusual behavior on that port, like not lighting the LED on the Sling adapter, but I had attributed it to using an unpowered USB hub. Now it doesn't work with the EHD even if it's direct connected.
 

BBCInc

Thread Starter
On the dry and dusty road
Feb 23, 2009
470
18
Colorado
I've heard that about compressed air but also never personally experienced it. Of course ESD is a very arcane science. Will try to remember to check check the port for mechanical damage in 6 months when I do the next dust blow-out. For now everything is working OK from the front port, just don't like the aesthetics.
 

BBCInc

Thread Starter
On the dry and dusty road
Feb 23, 2009
470
18
Colorado
I did do a reboot somewhere in the process, although I can't say for sure it was unplugged. Will try that along with a thorough port blow-out with a new can of compressed air and see if that helps.
 

3HaloODST

SatelliteGuys Master
Pub Member / Supporter
Jul 2, 2010
6,648
97
Earth
The main things to consider with canned compressed air are not to use it upside down and not to blow the air for more than a second or two at a time.

Sounds to me like the receiver needs a replacement, if the USB port is not working correctly.
 

BBCInc

Thread Starter
On the dry and dusty road
Feb 23, 2009
470
18
Colorado
Did a careful blow-out with a new can of compressed air and am happy to say the rear USB port on my 722 is back to full operation. My conclusion is enough residual dust must have entered it during the first dusting to disable EHD detection. Thanks everyone for your help!
 
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