It's a stand alone 8Ch DVR system box, and no it doesn't come on.
I picked it up at a swap meet to play with.
I was looking over the system and saw this.
I'm looking at the pics you sent it does look like glue although i'm not sure if its the chloroprene type glue, (which becomes conductive when it blackens)
The mystery is the component its covering is it a zener diode, or an inductor.... that's what im trying to figure out. I would remove the glue but im unsure if it killed that component..
Yes i love Nichicon MUSE Audio Capacitors...they would look awesome all over any motherboard
Yes, remove that black gunk first, try gently scraping it off with a screwdriver tip , use some cottow swabs dabbed in isopropyl alcohol if needed.
That gunk goes brown / black with time and becomes conductive, so it can create connections between pins.
I would also warm up the plastic shroud on that connector or desolder the connector completely to make sure there's no black stuff under the connector potentially creating a low resistance path between the two pins of the connector.
Also scrape that crap between U10 and U11, the stuff may cause problems between those chips.
I doubt the crystal has problems, they used this blackened glue to keep it stuck to the board and not vibrate or shake around. But they use some plastic sleeve around the crystal case, so I doubt there's some connection between the case of the crystal and stuff on the board, i doubt the crystal is affected.
Nevertheless, you should remove that black stuff before continuing the diagnostics.
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