The little 7" LCD I had connected to my router went dark a few months ago.
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The little 7" LCD I had connected to my router went dark a few months ago. I replaced it with a spare (which, annoyingly, required a VGA-to-HDMI adapter) and put it in a drawer with its power supply.
I came across it today while cleaning and decided I should investigate.
First order of business: does the power supply supply power?
Multimeter said no.
Opened it up.
Well, at least the problem was obvious.
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The little 7" LCD I had connected to my router went dark a few months ago. I replaced it with a spare (which, annoyingly, required a VGA-to-HDMI adapter) and put it in a drawer with its power supply.
I came across it today while cleaning and decided I should investigate.
First order of business: does the power supply supply power?
Multimeter said no.
Opened it up.
Well, at least the problem was obvious.
@ryanc@infosec.exchange Well Here's Your Problem
but hey! maybe you have a working screen, still!
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The little 7" LCD I had connected to my router went dark a few months ago. I replaced it with a spare (which, annoyingly, required a VGA-to-HDMI adapter) and put it in a drawer with its power supply.
I came across it today while cleaning and decided I should investigate.
First order of business: does the power supply supply power?
Multimeter said no.
Opened it up.
Well, at least the problem was obvious.
-
R AodeRelay shared this topic
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@ryanc@infosec.exchange Well Here's Your Problem
but hey! maybe you have a working screen, still!
@domi Yes, probably!
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@ryanc This stuff isn't exactly what I get paid to do, so I *could* be wrong, but I don't *think* it's supposed to look like that...
@mkj The sandwich is not supposed to be open-face.
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The little 7" LCD I had connected to my router went dark a few months ago. I replaced it with a spare (which, annoyingly, required a VGA-to-HDMI adapter) and put it in a drawer with its power supply.
I came across it today while cleaning and decided I should investigate.
First order of business: does the power supply supply power?
Multimeter said no.
Opened it up.
Well, at least the problem was obvious.
@ryanc@infosec.exchange that's not even a "power" IC, it's a microcontroller… quite a few other bits must have gone quite wrong to send enough current to make it explode like that! ouch
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The little 7" LCD I had connected to my router went dark a few months ago. I replaced it with a spare (which, annoyingly, required a VGA-to-HDMI adapter) and put it in a drawer with its power supply.
I came across it today while cleaning and decided I should investigate.
First order of business: does the power supply supply power?
Multimeter said no.
Opened it up.
Well, at least the problem was obvious.
@ryanc on the bright side, looks like most of thoes through hole components should be REALLY easy to salvage for other fun shenanigans!
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The little 7" LCD I had connected to my router went dark a few months ago. I replaced it with a spare (which, annoyingly, required a VGA-to-HDMI adapter) and put it in a drawer with its power supply.
I came across it today while cleaning and decided I should investigate.
First order of business: does the power supply supply power?
Multimeter said no.
Opened it up.
Well, at least the problem was obvious.
@ryanc That's not very typical, I'd like to make that point. There are a lot of these chips being used around the world all the time, and very seldom does anything like this happen. I just don’t want people thinking that swtch mode power supplies aren’t safe. I’m not saying it wasn’t safe, it’s just perhaps not quite as safe as some of the other ones. Some of them are built so that the top doesn’t fall off at all.
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@ryanc@infosec.exchange that's not even a "power" IC, it's a microcontroller… quite a few other bits must have gone quite wrong to send enough current to make it explode like that! ouch
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R ActivityRelay shared this topic
