Here is an average noname small monitor.
It's rated for 12V DC.
I screwed up and plugged it into 24V.
Surprisingly, it worked without a problem for several minutes.
But then there was a loud bang.
At which point i unplugged it, looked around and realized
what have i plugged it into.
So far, typical.
But the strange part is, it still works just fine.
There wasn't any smell of the magic smoke escaping, all the functionality is still there, there are no glitches or anything.
The survival is not too surprising - the power input is going straight into a pair of ACT4060A DC/DC chips, and they have 28V absolute maximum and up to 24V nominal.
The thing is supposed to go into a car, so i guess they expected some transients.
The question is - what made the bang then?
I suspect it might have been a capacitor venting, but i checked them all and they all appear to be fine.
Can anyone see anything blown or whatever could have made a bang?
Hi-res main board:
Back:
Front:
The screen part contain only the panel and a PCB strip with buttons, nothing else.
Backlight supply is on the main board, and is after the input DC/DCs.