Blown nvr

rawsy

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#1
Hi guys, I’m not sure this is the place for this but I am hoping somone may offer help.
I have a friends nvr here that has stopped working and when opened found something that looks like a bust capacitor that has leaked everywhere. Please see attached


Is this fixable
Is the silver thing a capacitor

Thanks
 

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Spectre

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#2
Both silver things to the right of the heatsink are crystals. Main one is 24MHz for CPU and I think the cylindrical one lower is one for a real time clock and is probably 32.768kHz. The cylindrical can style is typical for 32.768kHz ones.

That brown stuff is glue that was applied to stop the cylindrical crystal moving about in transport, I think. I have seen similar and it can get everywhere.

There are no electrolytic capacitors in that picture. There is a battery, probably a CR2032, but that isn't the culprit.


I hope that's a cat hair :eek:.
 
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rawsy

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#3
It’s not a pube I don’t get that exited over electronics lol

Thanks for the help. Not sure what the issue is here. That was the last boy thing that looks suspect. It looks strange though for glue.
 

Spectre

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#4
It’s not a pube I don’t get that exited over electronics lol

Thanks for the help. Not sure what the issue is here. That was the last boy thing that looks suspect. It looks strange though for glue.
I've seen similar looking stuff before before, not sure what it is. On looking again it might be the stuff used to attach the heatsink.
 

Captin

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#5
Looks to me like something has been spilled on the board, most of the "glue" I've seen tend to be a little lighter in colour and thicker, like hot glue or silicone. As for CPU heatsink paste I've only ever seen white or silver, even when heated it seems to keep it's colour.

If something has been spilled then it could have shorted any number of those tiny components or even the chip.
 

Spectre

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#6
Looks to me like something has been spilled on the board, most of the "glue" I've seen tend to be a little lighter in colour and thicker, like hot glue or silicone. As for CPU heatsink paste I've only ever seen white or silver, even when heated it seems to keep it's colour.

If something has been spilled then it could have shorted any number of those tiny components or even the chip.
Not heatsink paste but heatsink adhesive or glue:

So. This famous 'brown glue' on circuit boards. How to remove it? - Page 1
 

chookey

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#7
Has the heatsink moved? Looks very close to shorting the pins out bottom right.
Just looked again, should be above the pins anyway.
 

Spectre

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#8
Has the heatsink moved? Looks very close to shorting the pins out bottom right.
Just looked again, should be above the pins anyway.
It's a QFP and the heatsink will be about 0.5mm away from those pins so nothing to worry about :).
 

rawsy

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#9
not sure what happened it powers up but there is no picture coming from it. when i had a look inside the brown stuff looked suspicious. I guess its just goosed.
 

Spectre

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#10
not sure what happened it powers up but there is no picture coming from it. when i had a look inside the brown stuff looked suspicious. I guess its just goosed.
Have you tried a different PSU?

If you take more pics of the board I can suggest what to test. I'm sure there are other members with experience with the same unit too.
 

rawsy

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#11
Have you tried a different PSU?

If you take more pics of the board I can suggest what to test. I'm sure there are other members with experience with the same unit too.
Thanks , the seller has gotten back to me so hopefully I can get a replacement . I will post the pics if I don’t have any joy from them.
 

rawsy

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#12
They have offered me a new nvr for £60 which is cheaper than I can find online. At least I will have another 12 months. Here are the pictures but I can’t see anything other than the suspected glue.
6E3C86A6-9BCD-43C7-82E3-83A8F2B2DBBB.jpeg
 

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