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Missing diodes near the HDMI port. Can anyone ID them?

I have some missing (what looks like) diodes under the HDMI port.

They are small, black rectangles. There is a line on them like a diode. There is a small marking on them that looks like a "7"

There are 8 of them in total on the board. They are on pin 1, 3, 4, 6, 7, 9, 10 and 12.

I am missing the ones on 1, 3, 7, and 9, although I think all 8 of them are the same.

They are marked "EG###" on the silkscreen.

Can someone ID?

EDIT: I found the schematics and they show part number M1015860-001 but Googling the part number returns nothing useful.

I would rather not have to buy a whole broken motherboard to salvage these parts if I can help it.

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Are you certain there are supposed to be diodes there in the first place? I've seen perfectly working motherboards with seemingly missing components.


Yes, these are TVS (Transient Voltage Supression) avalanche diodes that are for clamping incoming ESD surges from the HDMI port, dumping excess current to ground in the event of an ESD hitting the HDMI port. They are protection diodes.


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Matt by the symbol you know that those are TVS diodes. In this case they are used as HDMI filter ESD TVS diodes. Problem is that there is nothing with the number you listed. Which is not a surprise since this may be a single manufacturer that made some deal with microsoft. The Xbox One X used different packages for those diodes but those should essentially have the same values.

Working Voltage: 5 V
Termination Style: SMD/SMT
Clamping Voltage: 8.4 V
Vesd – Voltage ESD Contact: 12 kV
Vesd – Voltage ESD Air Gap: 25 kV
Cd – Diode Capacitance: 0.5 pF
Ipp – Peak Pulse Current: 4 A

You could try Mouser.com or Digikey.com and see if you can find them. You can also contact both of those via email. There customer service department is usually pretty helpful. Or you could get a board that has failed other than the HDMI circuit and use it to harvest those diodes. If nothing else, check on here and see if they can help you.

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Thanks oldturkey03 I have one here with the same issue and this info was invaluable. Cheers!


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Matt wird auf ewig dankbar sein.

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